跟读练习: Pufferfish | Masters of Self-Defense - 通过视频学习英语口语
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Hi everybody, my name is Sarah.
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Welcome back to Future Zoologist Academy.
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Today we'll be learning about a fish
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that is very well known for its useful and adorable ability to inflate like a balloon.
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Today we're learning all about pufferfish.
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Let's get into it.
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Pufferfish are a family of fish with about 200 different species.
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They have many different nicknames, including puffers, balloon fish, blowfish, and others.
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They're sometimes confused with a porcupine fish, which though is similar, they are not the same.
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Pufferfish are most commonly found in warm, tropical oceans.
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They're commonly found in shallow water in protected habitats like coral reefs.
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There are a few species that live in cooler temperate water, but no pufferfish live in cold water.
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Surprisingly, there are several pufferfish species that live in freshwater.
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Pufferfish are, of course, named for their ability to puff up like a balloon, which is one of the ways that they defend themselves from predators.
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However, they have many other ways to defend themselves as well.
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The best way for a pufferfish to protect themselves is to stay hidden,
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and they do this by hiding in cracks and crevices in the reef and by using countershading.
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Countershading is a type of camouflage where an animal has a dark colored back and a light colored belly.
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This helps them stay camouflaged from animals that are both above them and below them.
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Pufferfish are typically slow swimmers, but if spotted by a predator, they can use quick bursts of speed to escape into hiding places.
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They also have a pretty good sense of sight, and they can move their eyes independently and look in different directions at the same time.
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This makes it hard for predators to ambush or sneak attack them.
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If they can't escape, then they inflate like a balloon.
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And they inflate by filling their expandable stomach with water or air if they're up at the surface.
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When they become larger, they become more intimidating to predators
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and it's harder for a predator to get their mouth around the pufferfish's body.
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Their skin is also covered in spines which stick out when they're inflated.
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Sometimes predators may manage to catch a pufferfish before it inflates
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and can choke if the pufferfish inflates while in the predator's throat.
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If they manage to swallow the pufferfish, they may still find themselves in quite a bit of trouble because most pufferfish are poisonous.
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Most pufferfish have a dangerous neurotoxin in their organs which is powerful enough to kill small predators.
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Neurotoxins are especially dangerous because they affect an animal's nervous system,
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which includes their brain and how their brain communicates to the rest of their body.
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With all of these defenses, it may seem like pufferfish should be invincible, but they do actually have some predators.
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Their main predators are sharks, some species of sea snakes, and large fish.
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Larger pufferfish have fewer predators than smaller species.
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The largest pufferfish is the starry puffer, which can measure between three and four feet in length or about one meter.
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The smallest species usually measure just a couple inches in length, sometimes even smaller.
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Not only do pufferfish vary in size, they also vary quite a bit in their colors and patterns.
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Some pufferfish species have the ability to slightly change their color
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or the intensity of their color depending on conditions in their environment.
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And as we mentioned before, many pufferfish have counter shading where they have a darker color on their back and a lighter belly.
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Counter shading is primarily used for avoiding predators, though some pufferfish species also use it to help them sneak up on their prey.
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Most pufferfish species feed on algae and small invertebrates.
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Some of their main prey items include mollusks like clams, mussels, and snails.
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They also feed on crustaceans like crabs and shrimp, and they even feed on worms.
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The scientific name of the pufferfish family is tetraodontidae, which translates to four tooth.
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And they got this name because their teeth are fused together in a way
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that makes it appear like they have four large teeth.
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And their large teeth give them a beak-like structure
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that is strong enough to crack open the hard shells of mollusks and crustaceans.
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Pufferfish typically feed alone.
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The main reason pufferfish come together is for breeding.
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The breeding behaviors of pufferfish vary quite a lot between species.
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Most ocean pufferfish reproduce by spawning, where females release their eggs,
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males release their sperm into the water at the same time where they become fertilized and they float around as plankton.
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Some species attach their eggs to hard structures like rocks instead.
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Either way, the eggs develop in the water and And eventually, a pufferfish emerges that resembles a tiny little version of the adult.
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There is a unique species of pufferfish,
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the white-spotted pufferfish, that actually attracts mates by creating elaborate designs in the sand.
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If females are impressed by the design, she'll mate with that male and lay her eggs in the sand in the design.
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This behavior has stumped scientists for years and years.
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If you'd like to learn more about it and watch a video, please be sure to visit our lesson.
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Regardless of their breeding behaviors, newborn pufferfish are incredibly small and vulnerable to predators.
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Some species actually have a coating of poison on their body when they're young rather than in their organs,
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which actually causes predators to spit them out if they try to eat them.
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A pufferfish's poisons can actually be deadly to humans as well for those that are brave enough to eat them.
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Pufferfish is considered to be a delicacy in some parts of the world, and if it's not cooked and prepared properly,
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it could be bad news for any human that tries to eat it.
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Overfishing pufferfish and collecting them for the aquarium trade can be harmful to pufferfish populations.
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However, their greatest threat is actually habitat loss.
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In many parts of the world, the coral reefs that they rely on for protection and finding food are being damaged.
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And one way that we can help protect pufferfish is by protecting coral reefs, especially the parts of the reefs that are important to them.
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Some organizations, like a scuba diving shop in Costa Rica,
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is actually working to train scuba divers in the area to identify pufferfish species
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and document their sightings so we can learn more about the parts of the reef that the pufferfish rely on.
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Now in other parts of the world pufferfish can actually be a problem.
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In some regions pufferfish are invasive.
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They've been introduced to areas where they are not supposed to be and they out-compete native species for food.
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Local governments in these regions have worked with fishing organizations to
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try to encourage people to take as many pufferfish out of the ocean as they can
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and unfortunately they haven't really seen much success because pufferfish breed so quickly that their populations just seem to keep growing.
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So pufferfish are unusual for us to talk about for conservation
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because depending on where you are in the world pufferfish may need our protection or they may need to be removed.
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If you would like to learn more about puffer fish conservation and if you would like to do quizzes,
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activities, projects and learn even more please be sure to visit that link below to check out our puffer fish lesson.
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Thank you so very much for joining me today to learn all about the adorable puffer fish.
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I can't wait to see you at our next lesson.
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Thank you very much.
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Bye!
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本课的词汇与口语要点
视频中反复出现的词有：pufferfish, species, predator, fish, reef。 这段视频共有 90 个句子、1276 个单词可供跟读。 讲话部分时长为 8:54。 说话人语速平稳，每分钟约 143 个词，很适合跟读。 只有 77% 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
视频中最难的 15 个单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| pufferfish 名词 | /ˈpʌfɚˌfɪʃ/ | 河豚 |
| predator 名词 | /ˈpɹɛd.ə.tɚ/ | 掠食者, 天敵 /天敌 |
| inflate 动词 | /ɪnˈfleɪt/ | 膨脹 /膨胀 |
| reef 名词 | /ɹiːf/ | 礁, 暗礁 |
| balloon 名词 | /bəˈlun/ | 氣球 /气球 |
| breed 动词 | /ˈbɹiːd/ | 配種 /配种 |
| coral 名词 | /ˈkɔɹəl/ | 珊瑚 |
| crustacean 名词 | /kɹʌsˈteɪʃən/ | 介蟲 /介虫, 甲殼動物 /甲壳动物 |
| neurotoxin 名词 | /ˈn(j)ʊɹoʊtɑksɪn/ | 神經毒素 /神经毒素 |
| scuba 名词 | /ˈskuːbə/ | 水肺 |
| prey 名词 | /pɹeɪ/ | 獵物 /猎物 |
| sneak 动词 | /sniːk/ | 爬, 潛行 /潜行 |
| adorable 形容词 | /əˈdoɹ.əˌbəl/ | 可愛 /可爱 |
| poison 名词 | /ˈpɔɪ.zən/ | 毒, 毒物 |
| belly 名词 | /ˈbɛli/ | 腹, 腹部 |
视频中出现的短语动词
| 单词 | 发音 | 释义 |
|---|---|---|
| check out 动词 | 退房 | |
| come together 动词 | /ˈkʌm tʊˈɡɛðɚ/ | 集合, 联合 |
| stick out 动词 | 突出, 凸出 |
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 | is also covered · are fused · are impressed |
| 现在完成时 have/has + 过去分词 — 过去发生但与现在仍有关联的事 | has stumped · They've been introduced · have worked |
| 定语从句 who / which + 从句 — 补充说明人或事物 | balloon, which is · organs which is · puffer, which can |
需要注意的发音
说话人用了 13 次缩略和弱读形式，例如 they're, can't, haven't。请按听到的简短形式来说。
- “sh” 和 “zh” 音: pufferfish /ˈpʌfɚˌfɪʃ/, camouflage /ˈkæ.məˌflɑːʒ/, crustacean /kɹʌsˈteɪʃən/, shade /ʃeɪd/, blowfish /ˈbloʊˌfɪʃ/
- 长单词——注意重音位置: neurotoxin /ˈn(j)ʊɹoʊtɑksɪn/, adorable /əˈdoɹ.əˌbəl/, delicacy /ˈdɛlɪkəsi/, intimidate /ɪnˈtɪmɪdeɪt/, invertebrate /ɪnˈvəːtɪbrət/
中文母语者容易读错的音：
- /v/ — 不要读成 /w/，上齿轻触下唇: crevice /ˈkɹɛvɪs/, invertebrate /ɪnˈvəːtɪbrət/, invincible /ɪnˈvɪn.sə.bəl/, invasive /ɪnˈveɪsɪv/, dive /daɪv/
- 词尾辅音 — 要读清楚，后面不要加元音: pufferfish /ˈpʌfɚˌfɪʃ/, inflate /ɪnˈfleɪt/, reef /ɹiːf/, breed /ˈbɹiːd/, camouflage /ˈkæ.məˌflɑːʒ/
- /r/ 和 /l/ 的区别: coral /ˈkɔɹəl/, adorable /əˈdoɹ.əˌbəl/, fertilize /ˈfɜː(ɹ)tɪlaɪz/, resemble /ɹɪˈzɛmbəl/, translate /tɹænzˈleɪt/
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 pufferfish, predator, inflate 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。