跟读练习: IELTS listening practice Part 4 - Leatherback turtle (answer & transcript) - 通过视频学习英语口语
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secreture called leatherback turtle.
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Janet O 'Vanakin of Florida Atlantic University has shown that they are the voltages of the leatherback's streamlined shape.
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Swimming leatherback turtles have a lower drag, more efficient than other species indicating more efficient force.
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To swim at the same distance to other sea turtles of the comparable size and weight, leatherback turtles spend on average 20 % less energy.
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Among all the deep diving animals, the champions have always been assumed to be the marine mammals, the great whales and airless seals.
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Our recent investigations, however, suggest that leatherback sea turtles may also be ranked among the ocean's greatest air -breathing dive reptiles.
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While mirroring the dives of the leatherback sea turtles near St. Crocs, In the U .S.
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Virgin Islands, scientists recorded a 650 pounds female ascended to more than 3 ,000 330 feet and remained there for 37 minutes.
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High pressure also poses a challenge to the deep diver in terms of strong forces that could compress the chest.
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causing broken bones or tissue damage.
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Unlike its hard -shelled relatives, Leatherbugs has a softer shell made up from widely separated ribs embedded in thick tissue.
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and whole structure is overlaid with a leathery skin.
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How do the deep diving animals, whales, seals, penguins, and leatherback turtles avoid decompression, sickness, and other hazards while they dive to the great depths,
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even sleep for a long period of time?
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Many of the deepest diving marine mammals have a small lungs
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and falsely exhale before diving in addition to reducing the balance so that they can dive more easily.
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This severely limits the amount of nitrogen in their bloodstream.
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One reason the leatherback ranges so far may be to specialise the diet
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This giant of the sea feeds mainly on jellyfish full of high protein
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and other useful minerals that are required during the day.
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Although the variety of jellyfish and related prey are abundant, They are eaten by few other animals.
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As one might suspect, a lifespan eating mostly jellyfish requires some special adaptions to make the job easier.
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During the 1984 and 1985 nesting seasons, With the assistance of scientists, attach the recorders to 10 female leather bags that just laid eggs.
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As a result, we are able to monitor the pattern of migration in Atlantic Ocean, when they return to the sea.
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Some of the longest travel recorded for many animals have been made by this marine turtle.
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In 1970, a female leatherback was tagged when she nested in Surami on the northeastern coast of South America.
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Less than one year later, she was captured off the coast of Ghana, West Africa, having traveled 3 ,700 miles across the Atlantic Ocean.
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Upon returning to the surface, the turtles change a quick breath and immediately hanging the street down again.
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Little or no time was given to sleep or rest.
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We then begin to track and tag the turtles when they swim back to the surface.
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On closer examination, we notice the difference in dives depending on the time of the day.
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Night dives were shallower with less in depth than day dives.
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Leatherbacks are such swimmers that they rarely stop moving a behavior that has made it impossible to keep them in captivity.
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The front flippers and more than half the lens of Ditto's body and the generated power from huge muscles.
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which can account for 30 % of the animal's total body weight.
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Since leather bags cannot easily be studied in captivity, researchers have been developing methods of studying them at sea.
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They use the recorder, an instrument capable of recording location and the depths in C.
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developed by Gerard Kuhlman of Psychological Research Laboratory.
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The device has been used to study diving marine animals.
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Why they keep diving, scientists soon realized that the turtles were probably costing much of the energy to follow their food source.
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In tropical waters, jellyfish are most common at great depths in a biological zone called the deep scattering layer.
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Discovered shortly after development of the sonar,
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This zone consists of a layer of zooplankton below 1 ,800 feet during the day and migrates to the surface at night.
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关于本课
在本课中，学习者将通过收听一段关于皮革背海龟的讨论，练习雅思听力和提高英语发音技巧。学习者将能够了解皮革背海龟的独特适应特征、迁徙模式以及它们在海洋中的栖息习惯。这段录音不仅富有教育意义，还能够帮助学习者增强听力理解能力并提升口语表达。
关键词汇与短语
- 皮革背海龟 (Leatherback turtle)
- 高压 (High pressure)
- 迁徙模式 (Migration pattern)
- 减压病 (Decompression sickness)
- 重力 (Buoyancy)
- 庞大的肌肉 (Huge muscles)
- 深水散射层 (Deep scattering layer)
- 记录仪 (Recorder)
练习提示
在进行雅思口语练习时，特别是针对这段视频的速度和语调，采用shadow speech方法尤为有效。在听的过程中，可以尝试模仿内容的语调、节奏和重音，从而提高口语的流畅度。具体技巧可以包括：
- 在观看视频时，先集中注意力理解内容，尽量对照文字记录，保持对话内容的关注。
- 重复收听每个段落，直到能够自然流畅地跟随语音而说出相同的句子，这有助于提高提高英语发音的能力。
- 可以使用shadowing site提供的资料来进行更有趣的练习，增强学习的互动性。
- 留意发音中的重音和语调变化，尝试用不同的音调来表达相同的句子，增加口语表达的多样性。
通过这样的练习，学习者不仅能有效提高自身的英语听说能力，还能对自然界有更深的理解。
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 | been assumed · be ranked · are required |
| 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 shown · have always been assumed · have been made |
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。