跟读练习: All About Jellyfish - 通过视频学习英语口语

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Today it's time to learn all about jellyfish.

Despite their name, it's important to know that jellyfish are not fish at all.

In fact, to avoid confusion, they are sometimes called sea jellies, or even just jellies.

Characteristics of Jellyfish Jellyfish are invertebrates, which means they don't have bones.

They also have no brain, no heart or other organs like lungs or gills.

Jellyfish obtain the oxygen they need through a process called diffusion, whereby they absorb oxygen directly through their thin body walls from the surrounding water,

allowing them to survive without specialised respiratory organs.

Made up mostly of water, jellyfish are characterised by their gelatinous, umbrella -shaped bells and trailing tentacles.

Jellyfish are free swimming, which means they don't really have a permanent home.

They often drift with ocean currents, travelling through large stretches of the ocean, seas and bays.

Jellyfish play an important role in the ocean.

They function both as predators and prey.

They feed on small fish, plankton and even other jellyfish, using their tentacles to ensnare and immobilise their prey with toxins.

At the same time, they are an essential food source for various larger species, such as turtles and certain fishes.

The main part of a jellyfish is the bell, which looks like an umbrella.

This bell moves by pulsating, pushing water from underneath to help the jellyfish swim or float.

The surface of the bell can be smooth or have frilly edges depending on the type of jellyfish,

and it holds their basic digestive and nervous systems.

Hanging from the bell are the jellyfish's tentacles, which they use to defend themselves and catch food.

These tentacles have thousands of tiny stinging cells called nematocysts.

Each cell has a small dart that can shoot out and deliver venom, which paralyzes or kills small sea creatures.

Jellyfish can stretch out or pull in their tentacles when they need to.

Below the bell are the aural arms, which are thicker and look a bit like the tentacles, but have a different job.

They help move the food caught by the tentacles to the jellyfish's mouth.

Types of Jellyfish Jellyfish are found in every ocean in the world

and they come in a variety of shapes sizes and colors.

Moon jellyfish are one of the most common and recognizable jellyfish species.

The moon jellyfish is known for its translucent saucer -shaped bell which can be up to 40 centimeters in diameter.

These jellyfish typically inhabit temperate and tropical oceans around the world and are often seen in large numbers.

Their The diet mainly consists of plankton and small fish.

The lion's mane jellyfish holds the title for the largest jellyfish.

The lion's mane can have a bell diameter of over 2 metres and tentacles that extend up to 30 metres or more.

It is found in the cold waters of the Arctic, Northern Atlantic and North Pacific Oceans.

The tentacles are grouped in eight clusters, each cluster containing up to 150 tentacles, lined with nematocysts to capture prey.

Known for being one of the most venomous marine creatures,

the box jellyfish has a cube -shaped bell and can grow up to 20 centimetres along each side.

Its tentacles, which can reach up to three metres in length, are covered with potent venom that can be fatal to humans.

Box jellyfish are primarily found in the waters of the Pacific and Indian Oceans, particularly around northern Australia and throughout Southeast Asia.

Cannonball jellyfish are named for their round, cannonball -like shape.

This jellyfish is common in the coastal waters of the southeastern

United States and into the Caribbean.

The bell of the cannonball jellyfish can reach up to 25 centimetres in diameter, and while its sting is not generally harmful to humans,

it can stun small fish.

These are just a few examples of the diverse array of jellyfish species found in oceans around the world.

Jellyfish Life Cycle One super interesting thing about jellyfish is their life cycles, which include several unique stages.

The jellyfish life cycle starts when a female jellyfish releases eggs into the water, which are fertilised by sperm from a male jellyfish.

These fertilised eggs turn into tiny, free -swimming larvae called planuli.

The planuli drift with the ocean currents until they find a good place to settle, like the sea floor or a rock.

They then attach themselves and become polyps, which look like tiny sea anemones.

Polyps can stay in this form for a long time, catching and eating small organisms.

After a while, polyps start to make new jellyfish by forming tiny stacks called aphirae.

These aphirae eventually break off and become young jellyfish.

They grow into adult jellyfish which release eggs and sperm into the water starting the cycle again.

Jellyfish and people.

Interactions between jellyfish and people cover a wide range of experiences from harmful to beneficial.

Jellyfish stings are a common concern as their venomous tentacles can cause pain, allergic reactions and, in rare cases, severe health issues.

Jellyfish are also a source of food for people in several cultures, particularly in Asia, where they are harvested,

processed and enjoyed for their unique texture and purported health benefits.

Moreover, jellyfish play a significant role in scientific research.

Their simple nervous systems and bioluminescent properties have provided valuable insights into cellular processes and neurological functions,

contributing to advancements in medical and biological sciences.

Thus, the relationship between jellyfish and humans is a complex interplay of danger, nutrition and scientific discovery.

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本课的词汇与口语要点

这节口语课以视频“All About Jellyfish”为素材。视频中反复出现的词有：jellyfish, tentacles, bell, ocean, sea。这段视频共有 62 个句子、907 个单词可供跟读。讲话部分时长为 7:36。说话人语速平稳，每分钟约 119 个词，很适合跟读。只有 72% 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
egg 名词	/ɛɡ/	卵, 卵子
swim 动词	/swɪm/	游泳
diameter 名词	/daɪˈæmɪdɚ/	直徑 /直径
prey 名词	/pɹeɪ/	獵物 /猎物
sting 动词	/ˈstɪŋ/	蜇, 叮
metre 名词	/ˈmiːtəɹ/	米, 公尺
stretch 动词	/stɹɛt͡ʃ/	伸展, 拉
oxygen 名词	/ˈɑksɪd͡ʒən/	氧
organ 名词	/ˈɔːɡən/	器官
cluster 名词	/ˈklʌstɚ/	串, 叢 /丛
harmful 形容词	/ˈhɑɹmfl̩/	有害, 不良
umbrella 名词	/ʌmˈbɹɛl.ə/	傘 /伞, 雨傘 /雨伞
jelly 名词	/ˈd͡ʒɛli/	果凍 /果冻, 果子凍 /果子冻
venom 名词	/ˈvɛnəm/	毒液, 毒
bone 名词	/boʊn/	гўдў, гўдўзы

视频中出现的短语动词

单词	发音	释义
make up 动词	/ˌmeɪk ˈʌp/	組成 /组成

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 sometimes called · are characterised · are found
定语从句 who / which + 从句 — 补充说明人或事物	invertebrates, which means · swimming, which means · arms, which are

需要注意的发音

“th” 音: thin /ˈθɪn/, thick /θɪk/, smooth /smuːð/, underneath /ˌʌndɚˈniθ/
“sh” 和 “zh” 音: capture /ˈkæp.(t)ʃɚ/, interaction /ˌɪn.təˈɹæk.ʃən/, confusion /kənˈfjuːʒən/, nutrition /njuːˈtɹɪʃ.ən/, beneficial /ˌbɛn.ɪˈfɪʃ.əl/
长单词——注意重音位置: diameter /daɪˈæmɪdɚ/, primarily /ˈpɹaɪ.mə.ɹə.li/, biological /ˌbaɪ.əˈlɑ.d͡ʒɪ.kəl/, interaction /ˌɪn.təˈɹæk.ʃən/, beneficial /ˌbɛn.ɪˈfɪʃ.əl/

中文母语者容易读错的音：

/v/ — 不要读成 /w/，上齿轻触下唇: venom /ˈvɛnəm/, discovery /dɪˈskʌv.ɹi/, diverse /daɪˈvɜːs/, moreover /mɔːˈɹəʊ.və/, harvest /ˈhɑɹ.vəst/
词尾辅音 — 要读清楚，后面不要加元音: egg /ɛɡ/, stretch /stɹɛt͡ʃ/, drift /dɹɪft/, defend /dɪˈfɪnd/, thick /θɪk/
/r/ 和 /l/ 的区别: harmful /ˈhɑɹmfl̩/, umbrella /ʌmˈbɹɛl.ə/, primarily /ˈpɹaɪ.mə.ɹə.li/, trail /tɹeɪl/, tropical /ˈtɹɑ.pɪ.kəl/

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 egg, swim, diameter 这类单词。

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。

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跟读练习: All About Jellyfish - 通过视频学习英语口语

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