跟读练习: How Realistic Is Spider-Man's Web Slinging Antics? - 通过YouTube学习英语口语
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In the recent film starting Tom Holland, Peter Parker cooks up his own webbing in his high-school chemistry class.
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In the recent film starting Tom Holland, Peter Parker cooks up his own webbing in his high-school chemistry class.
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Now, he could have made it out of anything, like fishing line or even steel, and yet he chooses to replicate spider silk.
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Spider silk.
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This kid is trusting his life to a flimsy-looking strand of arachnid goo.
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But it turns out, if Peter's web is anything like real spider silk, then his web-slinging antics are more realistic than they might appear.
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Now, spider silk doesn't look very durable.
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After all, a strand can be as little as 1/40 the thickness of a human hair, but, pound for pound, it's stronger than steel.
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So if you twisted spider silk into a thread that was 2 millimeters wide, as thick as a strand of spaghetti, it could support 900 pounds before breaking, strong enough for a polar bear to hang from.
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So a scrawny kid, like Spider-Man? He's got this.
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Jim Kakalios: And that's just for a 2-millimeter-diameter webbing.
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If he needs more, he just makes it a little bit thicker, and it could support even more weight.
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Narrator: That's physicist Jim Kakalios, the author of "The Physics of Superheroes." He says that the secret to spider silk's strength is its structure.
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Real spider silk has two major components: extremely rigid nanocrystals that make the silk sturdy and stretchy, elastic polymers that make it pliable.
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That combination of tough and flexible makes the silk extremely hard to tear, and, if you look at Peter's lab notes, it looks like he tries to mimic that same structure.
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Kakalios: So, it looks like it is a set of organic molecules that he is using, and he's trying to combine them in ways to polymerize them, to basically take these complex molecules and link them together in longer chains that would then presumably fold down and develop these nanocrystals and the elastic polymers.
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Narrator: But Peter may have gone one step further and actually made one improvement to his synthetic silk.
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Kakalios: I think that, instead of these little nanocrystals of proteins that spiders use, he might be using carbon nanotubes to provide the strength and rigidity.
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Narrator: Carbon nanotubes are basically a sheet of carbon atoms that's been rolled up into a tube.
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And if Jim's right, Peter is one smart high-school student, because these tiny tubes are actually some of the strongest material known to humans.
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In fact, they're over 100 times as strong as steel.
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And that's when they're microscopic.
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So, a spaghetti-thin strand of this stuff, like what we see in "Spider-Man"?
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It could support far more than just 900 pounds.
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Kakalios: That would be able to support over 40,000 pounds.
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Narrator: Suddenly that ferry scene doesn't seem so far-fetched, especially since we have the technology to make those nanotubes in real life.
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Scientists at the University of Cincinnati, for example, have figured out how to grow carbon nanotubes in a lab and then spool them into threads.
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Sadly, those threads aren't meant for skyscraper-swinging antics.
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The researcher's goal is a tad more practical.
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Kakalios: If you could manufacture it and make threads out of carbon nanotubes, you could make lightweight clothing that would be stronger than Kevlar.
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Narrator: So, when you really think about it, the most unrealistic thing about Peter Parker's homemade webbing is that a high schooler figured out how to make it in his chem class.
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关于本课
在本课程中，我们将深入分析一段关于蜘蛛侠的网丝科技的讨论。在这段视频中，讲解了彼得·帕克是如何在高中化学课上制造自己的人造网丝的。通过这个案例，学习者将练习与“蜘蛛丝”相关的词汇和表达，了解如何通过生物学和化学的角度解释日常事物。此外，视频中还涉及了物理学知识，这将帮助你在雅思口语或其他英语口语练习中，能够更自信地表达复杂的主题和想法。
重要词汇和短语
- webbing - 网丝，指蜘蛛或蜘蛛侠使用的丝绳。
- synthetic silk - 人造丝，模仿自然蜘蛛丝的合成材料。
- carbon nanotubes - 碳纳米管，一种强度极高的材料。
- rigid - 刚性的，表示某物无法弯曲或改变形状。
- polymerize - 聚合，化学过程，通过它小分子结合成大分子。
- elastic - 有弹性的，指材料能够恢复原形的特性。
本视频练习技巧
在观看和跟读此视频时，请注意配合以下练习技巧：
- 保持适中的语速，逐渐适应视频中专家的表达清晰度，以便更好地听懂专业内容。
- 模仿讲解者的口音和重音，增强自我发音练习的效果，使你的英语流利度提高。
- 对于涉及复杂术语的部分，建议慢慢跟读，并在理解词汇含义后复述给自己，可提高口语自信心。
- 尝试复述视频中的重点内容，并讨论蜘蛛丝的强度与日常生活中的实用性，从而锻炼你的英语表达技巧和逻辑能力，有助于雅思口语部分的准备。
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。