跟读练习: Extreme Weather Science: Tornadoes, Hurricanes & Storms - 通过视频学习英语口语
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Wow!
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Did you hear that?
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What a hit!
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That was lightning!
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Thanks.
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I really got into the swing.
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No, I mean real lightning.
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We have to get in the house.
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How come we have to go in the house when it's lightning outside?
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Who do we ask for help when we have questions?
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Da -da -da -da!
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Maggie the Magnifying Glass!
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I'm Maggie, Maggie, I help to make things clear.
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Just look through my looking glass and answers will appear.
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I'm Maggie, Maggie, come and let's explore.
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And we'll discover lots of things you never knew before.
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I'm Maggie!
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How come we have to go in the house when it's lightning outside?
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Anytime you hear thunder or see lightning, you need to look for a safe place to be.
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Lightning and thunderstorms are a type of dangerous and powerful weather.
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Powerful weather storms take place all over the world every day.
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Would you like to find out more about storms?
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If so, we can go on a little adventure together!
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Would you like to learn about powerful weather, too?
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You would?
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Me, too!
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Yippee -skippee!
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Let's go!
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Don't forget your journal!
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Oh, yeah!
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Got it!
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My terrific scientific journal!
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Bring yours along, too!
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What are storms?
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Storms are a combination of weather that together make a powerful weather pattern.
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Storms can happen in warm weather and cold weather too.
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Some types of storms are blizzards, thunderstorms, tornadoes, and hurricanes.
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storms are a part of weather
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and all weather starts with sun weather gets its energy from the sun the sun heats up the earth's surface
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that warms up the air in the atmosphere warm air weighs less than cool air
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so the warm air rises or moves up When the warm air moves up,
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cool air, which weighs more than the warm air, sinks or moves down and replaces the warm air.
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Now, as the warm air moves up, it cools off, then begins to sink.
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This movement of air, warm air rising, cool air sinking, is an important part of making weather.
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All storms are created by two opposing weather patterns that collide.
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When they collide, it creates energy.
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The more energy, the more powerful the storm can be.
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I'm going to write that down in my journal.
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Storms are a severe form of weather and happen every day all over the world.
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Weather gets energy from the sun.
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Got it!
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What are thunderstorms?
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Let's talk about thunderstorms.
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Thunderstorms are a type of storm that has rain, thunder, lightning, and sometimes hail.
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Thunderstorms happen in places that are warm and humid.
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Like most weather, thunderstorms get their energy from the sun.
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On a hot summer day, the sun heats up the Earth's land and water.
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The Earth's surface heats up the air.
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The warm air rises, colder air sinks.
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The sun heats a body of water like an ocean.
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The water evaporates or turns into steam or vapor and then travels up into the sky.
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Then the water vapors become cooler and come together, collecting in clouds.
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Rain clouds are caused by the build -up of water droplets or solid ice ice crystals.
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The clouds get heavy and water falls back to the earth as precipitation,
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rain, hail, sleet, or snow.
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Okay, but what causes the lightning and what causes the thunder?
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I was wondering the same thing.
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Excellent question.
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What causes lightning and thunder?
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Here's what happens.
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Well, inside the cloud, strong air currents cause the air molecules to rub up against each other.
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This causes static electricity.
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Have you ever rubbed your feet on the floor wearing socks?
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Touched a doorknob and filled a shock?
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That's static electricity!
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And that's sort of what happens in a thunderstorm.
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Sometimes lightning can happen inside the cloud when an arc of electricity is created because of the difference of electrical charges.
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Lightning that happens inside clouds is called sheet lightning.
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Lightning can also happen because of the earth.
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The earth is positively charged.
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This can attract lightning.
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In this situation, an arc of electricity can strike, and the Earth answers with a return stroke.
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When lightning occurs, it can heat up the air to thousands of degrees.
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This causes the air to expand rapidly.
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This causes a huge shockwave we call thunder.
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When you see lightning and hear thunder, you should try to get indoors.
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You can always find safety in a car.
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Stay away from trees, towers, water, or any metal objects.
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I'm going to write that down in my journal.
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So, thunderstorms start with clouds.
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Static electricity causes lightning.
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Thunder happens when the lightning heats up the surrounding air.
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Got it!
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What are tornadoes?
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Sometimes large -scale thunderstorms called supercells can create a tornado.
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Thunderstorms form when warm, humid air rises upward.
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This is called an updraft.
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As the warm air rises, the cooler air begins to fall.
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When it touches down, that's when a tornado is created.
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Tornadoes come in different shapes and sizes.
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Powerful tornadoes can demolish buildings and carry houses, cars and trucks in the air.
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A tornado can destroy just about anything it touches.
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I'm going to write that down in my journal.
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Tornadoes are made from supercells or heavy thunderstorms.
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Got it!
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What are hurricanes?
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Hurricanes are another kind of powerful storm.
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It's a large, swirling storm.
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that produces lots of rain and very high winds.
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Hurricanes form over very warm parts of the ocean.
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Here's what happens.
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When high winds coming from opposite directions meet, they begin to rotate.
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The high winds can cause very high waves and rough seas.
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water vapor rises quickly
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and adds more power to the storm the longer it moves
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across the ocean the stronger the hurricane becomes in the center
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of the hurricane is a low -pressure area called the eye of the hurricane when the storm reaches land,
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the storm can begin to die down.
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But it also pushes water to the shore.
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This push of water is called a surge, or storm surge.
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The surge can cause terrible floods.
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Hurricanes produce lots of rain and high winds.
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Hurricanes can cause a storm surge that can cause floods.
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Got it.
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What are blizzards?
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Winter months can bring snowstorms, sleet, and freezing rain.
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But the most powerful winter storm is called a blizzard.
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Like all storms, blizzards can be very dangerous.
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Blizzards combine heavy snowfall, severe cold, blowing snow and wind.
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Blizzards make travel almost impossible.
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Many times roads and airports are shut down because of a blizzard.
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What makes a blizzard?
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Excellent question!
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Blizzards form when very cold air clashes with very warm moist air.
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The warm air is lifted up over the cold air.
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Where these two masses of air meet is called a front.
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This interaction of cold and warm air colliding can cause precipitation.
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Rain, hail, sleet, or snow For snow to fall,
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it must be cold enough in the clouds and on the ground.
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If the air is too warm, the snow will melt on its way down and change to rain, or freezing rain.
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Freezing rain happens when the temperatures on the Earth's surface are below freezing.
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The raindrops become supercooled.
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The result is ice that can accumulate on trees, wires, cars, and more.
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Freezing rain can cause travel problems on the roads and cause airports to be shut down.
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Cold weather storms can be very dangerous.
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Oh, I get it.
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Blizzards are severe winter storms.
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They form when warm and cold air collide.
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Got it!
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Thanks, Maggie!
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You're very, very welcome.
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Today I learned a lot about storms.
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I hope you did, too.
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These are the notes I took in my journal.
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Storms are a powerful form of weather and happen every day all over the world.
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Weather gets energy from the sun.
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Thunderstorms happen in places that are warm and humid.
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Tornadoes are made from supercells or heavy thunderstorms.
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Hurricanes produce lots of rain and high winds.
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Hurricanes can cause a storm surge that can cause floods.
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Blizzards are severe winter storms.
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Learning about storms is fun.
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Let's go on another scientific adventure real soon.
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Bye! So long!
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本课的词汇与口语要点
这段视频共有 164 个句子、1350 个单词可供跟读。 讲话部分时长为 13:27。 说话人语速较慢，每分钟约 100 个词，你有足够的时间模仿每一个音。 只有 78% 的单词属于英语最常用的 3,000 词，词汇难度较高。
视频中的重点词汇
视频中 15 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| lightning 名词 | /ˈlaɪt.nɪŋ/ | 閃電 /闪电, 電光 /电光 |
| hurricane 名词 | /ˈhʌɹɪkeɪn/ | 颶風 /飓风 |
| blizzard 名词 | /ˈblɪz.ɚd/ | 暴風雪 /暴风雪, 大風雪 /大风雪 |
| tornado 名词 | /tɔɹˈneɪ.doʊ/ | 龍捲風 /龙卷风 |
| cloud 名词 | /ˈklaʊ̯d/ | йүн, 雲 /云 |
| thunder 名词 | /ˈθʌndɚ/ | 雷, 雷公 |
| freeze 动词 | /ˈfɹiːz/ | 凍結 /冻结, 凍 /冻 |
| sink 动词 | /ˈsɪŋk/ | 沉, 下沉 |
| flood 名词 | /flʌd/ | 洪水, 洪災 /洪灾 |
| hail 名词 | /heɪl/ | лынзы, 雹 |
| vapor 名词 | /ˈveɪpɚ/ | 蒸氣 /蒸气 |
| humid 形容词 | /ˈhjuːmɪd/ | 濕 /湿, 濕潤 /湿润 |
| adventure 名词 | /ədˈvɛn.t͡ʃə/ | 奇遇, 冒險 /冒险 |
| weigh 动词 | /weɪ/ | 稱重 /称重 |
| precipitation 名词 | /pɹɪˌsɪpɪˈteɪʃn̩/ | 降水, 降水量 |
视频中出现的短语动词
| 单词 | 发音 | 释义 |
|---|---|---|
| heat up 动词 | 加熱 /加热 | |
| come together 动词 | /ˈkʌm tʊˈɡɛðɚ/ | 集合, 联合 |
| find out 动词 | 找出, 查明 | |
| warm up 动词 | /ˌwɔː(ɹ)m ˈʌp/ | 暖和（起來） /暖和（起来） |
需要注意的发音
说话人用了 9 次缩略和弱读形式，例如 I'm, don't, we'll。请按听到的简短形式来说。
- “th” 音: thunder /ˈθʌndɚ/, thunderstorm /ˈθʌn.dɚˌstɔɹm/
- “sh” 和 “zh” 音: precipitation /pɹɪˌsɪpɪˈteɪʃn̩/, shock /ʃɔk/, sheet /ʃit/, shore /ʃɔɹ/, interaction /ˌɪn.təˈɹæk.ʃən/
- 长单词——注意重音位置: electricity /ɪˌlɛkˈtɹɪsɪti/, precipitation /pɹɪˌsɪpɪˈteɪʃn̩/, electrical /ɪˈlɛktɹɪkəl/, interaction /ˌɪn.təˈɹæk.ʃən/, positively /ˈpɑ.zɪ.tɪv.li/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
- 录下自己的声音并与原声对比，特别注意 lightning, hurricane, blizzard 这类单词。
视频中的语法
说话人最常用的结构，并附上视频中的原话：
| 结构 | 视频中的用法 |
|---|---|
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | are created · are caused · is created |
| 义务：must / have to / need to 表示某事是必要的 | have to get · have to go · need to look |
| “going to” 表将来 be going to + 动词 — 计划或明显即将发生的事 | I'm going to write |
| “will” 表将来 will + 动词 — 决定、承诺或预测 | will appear · we'll discover · will melt |
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。