跟读练习: A brief history of dogs - David Ian Howe - 通过YouTube学习英语口语
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The End Since their emergence over 200,000 years ago,
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The End Since their emergence over 200,000 years ago,
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modern humans have established homes and communities all over the planet.
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But they didn't do it alone.
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Whatever corner of the globe you find Homo sapiens in today, you're likely to find another species nearby, Canis lupus familiaris.
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whether they're herding, hunting, sledding, or slouching.
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The sheer variety of domestic dogs is staggering.
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But what makes the story of man's best friend so surprising is
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that they all evolved from a creature often seen as one of our oldest rivals, Canis lupus, or the gray wolf.
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When our Paleolithic ancestors first settled Eurasia roughly 100,000 years ago, wolves were one of their main rivals at the top of the food chain.
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Able to exert over 300 pounds of pressure in one bone-crushing bite and sniff out prey more than a mile away,
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these formidable predators didn't have much competition.
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Much like human hunter-gatherers, they lived and hunted in complex social groups consisting of a few nuclear families,
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and used their social skills to cooperatively take down larger creatures.
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Using these group tactics, they operated as effective persistence hunters, relying not on outrunning their prey, but pursuing it to the point of exhaustion.
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But when pitted against the similar strengths of their invasive new neighbors, wolves found themselves at a crossroads.
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For most packs, these burgeoning bipeds represented a serious threat to their territory.
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But for some wolves, especially those without a pack, human camps offered new opportunities.
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Wolves that showed less aggression towards humans could come closer to their encampments, feeding on leftovers.
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And as these more docile scavengers outlasted their aggressive brethren, their genetic traits were passed on,
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gradually breeding tamer wolves in areas near human populations.
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Over time, humans found a multitude of uses for these docile wolves.
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They helped to track and hunt prey, and might have served as sentinels to guard camps and warn of approaching enemies.
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Their similar social structure made it easy to integrate with human families and learn to understand their commands.
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Eventually, they moved from the fringes of our communities into our homes, becoming humanity's first domesticated animal.
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The earliest of these proto-dogs, or wolf-dogs, seemed to have appeared around 33,000 years ago, and would not have looked all that different from their wild cousins.
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They were primarily distinguished by their smaller size and a shorter snout full of comparatively smaller teeth.
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But as human cultures and occupations became more diverse and specialized, so did our friends.
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Short, stocky dogs to herd livestock by nipping their heels.
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Elongated dogs to flush badgers and foxes out of burrows.
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Thin and sleek dogs for racing.
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And large, muscular dogs for guard duty.
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With the emergence of kennel clubs and dog shows during England's Victorian era, these dog types were standardized into breeds,
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with many new ones bred purely for appearance.
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Sadly, while all dog breeds are the product of artificial selection, some are healthier than others.
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Many of these aesthetic characteristics come with congenital health problems, such as difficulty breathing or being prone to spinal injuries.
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Humanity's longest experiment in controlled evolution has had other side effects as well.
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Generations of selection for tameness have favored more juvenile and submissive traits that were pleasing to humans.
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This phenomenon of selecting traits associated with youth is known as neotomy and can be seen in many domestic animals.
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Thousands of years of coevolution may even have bonded us chemically.
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Not only can canines understand our emotions and body language, But when dogs and humans interact, both our bodies release oxytocin,
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a hormone commonly associated with feelings of love and protectiveness.
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It might be difficult to fathom how every Pomeranian chihuahua and poodle are descended from fierce wolves.
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But the diversity of breeds today is the result of a relationship that precedes cities, agriculture, and even the disappearance of our Neanderthal cousins.
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And it's heartening to know that, given enough time, even our most dangerous rivals can become our fiercest friends.
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关于本课
在本课中，您将通过观看《狗的简史》这一视频，练习英语口语。视频讲述了狗的起源及其与人类之间的关系。这将帮助您在听力、发音和语调上提高，同时加深对狗的文化和历史背景的理解。通过跟随视频进行 shadow speech（影子语音）练习，您可以增强自己的口语自信心，尤其是在进行 雅思口语练习 时，可以更自如地表达。
关键词汇与短语
- Canis lupus familiaris - 家犬
- Canis lupus - 灰狼
- domestic dogs - 家犬
- hunter-gatherers - 狩猎采集者
- social groups - 社会群体
- persistence hunters - 持久猎手
- neoteny - 幼态保持
- oxytocin - 催产素
练习技巧
观看这个视频时，您可以尝试进行 shadowspeak（影子讲述）练习。建议您先仔细聆听视频中的内容，并注意讲者的语速和语调。由于这个视频的讲述速度适中，您可以逐句暂停并重复讲者所说的内容。这种方法非常有效，特别是在 英语口语练习 中，可以帮助您改进发音和语调。
建议在练习时，专注于视频中的每个关键词汇和短语，尝试完整重复它们，并与讲者的语音进行对比，以确保准确性。同时，使用 看YouTube学英语 的方式，您可以轻松接触到大量的学习资源，使语言练习变得更加灵活有趣。
利用多次的重复和跟读，您不仅能提升口语能力，也能在理解内容的过程中加深对经典话题的见解，如狗与人类的历史。这种综合学习方式将有助于您更好地为未来的英语交流做准备。
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。