跟读练习: Why Don't Blue Whales Eat Fish? - 通过YouTube学习英语口语
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The most massive land animals in the world all eat little stuff, grass and leaves.
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The most massive land animals in the world all eat little stuff, grass and leaves.
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And almost all of the most massive aquatic animals also eat something itty-bitty,
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tiny crustaceans called krill.
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Why do such big things eat such small things?
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Hi, I'm David, and this is MinuteEarth.
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The most ginormous animals all need to eat a huge amount of calories to fuel their massive bodies.
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But there aren't enough big,
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super calorie-dense meals around for them to eat.
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And even if there were,
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the giant's massive bodies aren't mobile or agile enough to actually capture that food.
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Instead, these mega-creatures meet their mega-calorie quota with something that's super-abundant
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and requires almost no effort to procure — little pieces of grass and leaves.
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And for our purposes, we're going to consider leaves to be little,
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even if they do come off of bigger things.
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And sure, leaves and grass aren't very calorie-dense compared to things other animals eat,
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but the giant's giant digestive tracts can hold a lot of them at once — we're talking hundreds of kilograms.
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Plus, the bigger an animal is,
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the longer the food stays in its digestive system,
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and the more microbes there are in there to break it down.
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All of that means that the giants are able to wring a lot of calories from grass and leaves,
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enough to meet their huge calorie demands.
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The abundance and ease of finding leaves and grass,
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and the specialized digestive systems to deal with large quantities of them,
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are why, at least on land,
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you see the same pattern in every biome.
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The very biggest animals are herbivores.
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Even back in the day when dinosaurs roamed the earth,
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the biggest animals weren't predators like T-Rexes,
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they were lumbering, leap-eating vegetarians.
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But what about the ocean?
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Like their counterparts on land,
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sea giants like blue whales are relatively unagile and have giant guts,
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so it makes sense that they'd eat the ocean equivalent of grass,
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huge blooms of tiny plant-like microorganisms called bitoplankton.
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But these ocean behemoths need so many calories every day that phytoplants,
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even lots and lots and lots of them,
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just aren't calorie dense enough to meet the demand.
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Luckily, those big phytoplankton blooms attract something else,
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billions of calorie packed krill that come together to graze in huge,
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slow moving, easy to find swarms.
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A blue whale that lunges back
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and forth through a swarm can easily take in more than enough calories to power its huge body.
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The equivalent on land would be if there were huge,
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slow moving swarms of grasshoppers that elephants could munch on instead of the grass itself.
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In that case, the pachyderms could pack in even more calories and likely get even bigger.
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Either way though, the same truth holds.
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For the biggest animals on earth,
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it turns out, food things come in small packages.
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本课简介
在这节课中，您将通过观看一段关于蓝鲸饮食的短片，了解关于巨大生物的饮食习惯以及它们如何获取所需的卡路里。您将学习如何提高英语发音，并练习片段朗读，以改善您的英语口语表达能力。通过跟随视频进行英语口语练习，您将能更好地理解和使用有趣的生物学相关词汇，并熟悉特定的说话语调和节奏。
关键词汇与短语
- 蓝鲸 (Blue Whale) - 世界上最大的动物之一。
- 磷虾 (Krill) - 蓝鲸的主要食物来源，小型甲壳类动物。
- 植物浮游生物 (Phytoplankton) - 海洋中的微小植物，蓝鲸摄取的基础。
- 消化系统 (Digestive System) - 动物处理食物的生理系统。
- 草食动物 (Herbivores) - 以植物为食的动物。
- 卡路里 (Calories) - 衡量能量的单位，生物获取能量的主要来源。
- 生态系统 (Ecosystem) - 各种生物与环境之间相互作用的系统。
练习技巧
在观看本视频时，请尝试使用shadowspeak技术，这种方法可以帮助您提高英语发音。视频的语速适中，适合跟随模仿。建议您在每个句子播报后，暂停并重复，直到您能够流利地说出整个句子。注意视频中的语调和重音，尽量让自己的表达与视频相似。通过看YouTube学英语，掌握正确的发音和语调，能让您在实际交流中更加自信。
练习时，请考虑关键词汇的使用：尝试用新的词汇造句，或者在自己的表达中加入这些内容。当您逐渐熟悉这些词语时，可以挑战自己，将更多相关内容融入到日常英语口语练习中。这不仅能帮助您提高英语口语能力，同时也能增加您对生物学主题的理解。
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。