跟读练习: Evolution of Dinosaurs in 10 Minutes - 通过视频学习英语口语

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If you traveled 250 million years into the past, you'd be witnessing the dawn of dinosaurs.

One of the leading theories is that dinosaurs evolved from a species known as archosaurs.

These were the dominant reptiles that appeared during the late Permian period.

To some, they may even look like dinosaurs.

And that's because they were ancestors to these incredible creatures.

Over time, the archosaurs split up into two groups.

One of these groups led to crocodiles, and the other led to dinosaurs, which continued evolving into thousands of different species.

One of the main traits they eventually gained was their bipedal abilities.

Early dinosaurs began to walk on two legs, freeing their front limbs for other uses, like grabbing food and defending themselves.

And that's just the start of their evolutionary journey.

Let's travel back in time 250 million years ago and witness the history of dinosaurs in 10 minutes.

Triassic Period As you enter this new era, you'll notice that the dinosaurs running around look pretty different from what you're used to seeing.

One of the earliest dinosaurs that emerged from the archosaurs was the Eoraptor.

This little guy was about the size of a dog barely one meter tall and weighing in at a meager 10 kilograms.

You know, we typically think of dinosaurs as these massive creatures, but it'll be a couple million more years before that started to happen.

We'll check in to see how those dinos are growing in size as we travel through time.

But for now, let's see what's happening to Earth.

During the Triassic period, the supercontinent Pangea starts to fragment, slowly altering global climates and ecosystems.

The climate was generally hot and dry, and there were no polar ice caps, creating a stark contrast to what you're typically used to in modern-day Earth.

The vegetation was also very different, and was crucial for the survival and evolution of dinosaurs.

The plants have different characteristics as well.

Some are tough, some nutritious, and others potentially poisonous.

Each one of them will influence the dietary and adaptive strategies of different dinosaur species.

Speaking of which, what are some other dinosaurs doing during this time?

Weighing in at about 23 kg and 1 m tall, we have the Coelophysis.

It was a little bit bigger than the Eoraptor, but that didn't stop it from being a fast and agile predator that likely preyed on smaller animals.

Now the Herrerasaurus was slightly taller at about 1.1 meters, but was a lot heavier at about 350 kilograms.

Then we have the Pladeosaurus.

This guy is way bigger than me.

It stood tall at about 3 meters and weighed up to 4,000 kg.

This was one of the earliest examples of how big dinosaurs could grow.

But wait, they get even bigger than this.

Despite their impressive forms, dinosaurs weren't the dominant creatures during the Triassic.

They had to share their environments with many other organisms, all vying for survival in the diverse ecosystems.

This was the case until the Triassic period would experience a great extinction event.

This was likely caused by massive volcanic activity, climate change, and potentially even some small asteroid impacts.

This will have a significant effect on life on Earth and lead to the extinction of numerous species.

But it wasn't all bad, especially for our dinosaurs.

This moment set the stage to bring new opportunities to these species, leading to them dominating the Earth.

Jurassic Period.

Now, instead of dinosaurs simply surviving, this is where they thrive.

Over the millions of years, different species have been evolving, and dinosaurs are now the rulers of the Earth.

They spread across continents, dominating the lush forests and arid deserts.

Occupying these areas were some massive dinosaurs, ones that you're probably a lot more familiar with.

We have the Stegosaurus, Brachiosaurus and Allosaurus.

These were some of the largest creatures ever to walk the Earth.

But you'd quickly notice that it wasn't just these massive beasts that were roaming around.

This era also saw the evolution of theropods.

These were smaller dinosaurs that had more of a bird-like form.

One of the most famous was the Archaeopteryx.

It was kind of like a mix between a dinosaur and a bird, with feathers and wings, but also with bony teeth and a tail.

The Archaeopteryx was a crucial link between birds and dinosaurs.

If you wait about 100 million more years, they'll evolve into the birds we know today.

Wait, is that a spoiler?

After 56 million years, the Jurassic period comes to an end.

This was after yet another extinction event happened.

Luckily, this one is more minor.

However, due to climate change, volcanic activity and sea levels changing, some species are going extinct.

This once again changes the landscape as the dinosaurs enter their final era, Cretaceous Period.

OK, we've now entered the Cretaceous Period.

And as we've been traveling through these millions of years, you may have noticed something's missing.

Right, one of the dinosaur's biggest stars hasn't appeared yet.

Say hello to the Tyrannosaurus rex.

The T-Rex was a massive beast.

It was 3.7 meters tall and 12 meters long.

Not only that, but it was a whopping 9 tons.

Equipped with a powerful jaw and incredibly sharp teeth, the T-Rex dominated the Cretaceous Kingdom.

It was one of the most dominant predators history has ever seen.

This colossal beast wasn't just scavenging leftovers.

It was an active hunter, stalking its prey with keen eyesight and a heightened sense of smell.

Among its favorite meals were the sizable herbivores like the Edmontosaurus.

But the T-Rex didn't stop there.

It would take on formidable opponents like the Triceratops and even other smaller theropods if the opportunity arose.

With its powerful jaws filled with 12-inch teeth, and its strong hind limbs that allowed it to run at speeds of up to 40 km per hour,

the T-Rex was a master of the hunt.

But this period wasn't just filled with massive beasts like the T-Rex.

Look around, and you'll also notice even more feathered dinosaurs in the Cretaceous period.

One of them being the Velociraptor.

Now, you typically see them portrayed like this, with no feathers, but evidence suggests that these creatures were quite feathered.

Now, the feathers weren't necessarily used for flying, more for warmth and stability.

And this one is the Microraptor.

Now, unlike the Velociraptor, its feathers likely were used for flight, giving us crucial insight into the evolution of birds.

Okay, as I mentioned earlier, Pangea was breaking up and forming into the continents we know today.

But because of this, some dinosaurs were forced to migrate and separate into different areas of the world.

These dinosaurs had to adapt to their new environments, potentially changing the course of their evolution.

But none of this matters when we consider what happens next.

The cataclysmic event.

Okay, as you've been hanging out with the dinosaurs for millions of years, an asteroid has been making its way toward Earth.

Then suddenly, it hits, creating a massive crater 150 km wide and 20 km deep.

Naturally, something this huge makes a devastating impact on the world, one that'll change it forever.

The asteroid's collision is massive, but its impact is felt long after the initial crash.

Due to the massive collision, the environment drastically changes.

Significant drops in temperatures start to occur, and debris from the crash begins to block out the Sun.

This impacts not only the dinosaurs' health, but also their food supply.

This devastating event wipes out 75% of the Earth's species, many of which are the dinosaurs we've been observing this whole time.

But don't worry, not all of the dinosaurs went extinct.

The aviation-based dinosaurs we checked out earlier managed to survive the asteroid strike, eventually evolving into birds.

Aftermath Now that most of the dinosaurs are extinct,

it's cleared the way for mammals to diversify and expand their impact on the world.

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With less competition, early mammals can now thrive and take over, which slowly, over time, allowed humans to evolve,

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building the world we know today.

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Dinosaurs went on to evolve for another 165 million years, but there's still so much we need to learn about them.

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Like, did you know that not all dinosaurs were cold-blooded?

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Some of them may have been warm-blooded, or even both.

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But that's a story for another WHAT IF.

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本课的词汇与口语要点

这节 B2 级别的口语课以视频“Evolution of Dinosaurs in 10 Minutes”为素材。视频中反复出现的词有：dinosaur, period, massive, species, Earth。这段视频共有 105 个句子、1391 个单词可供跟读。讲话部分时长为 10:03。说话人语速平稳，每分钟约 138 个词，很适合跟读。只有 78% 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
dinosaur 名词	/ˈdaɪnəsoɹ/	恐龍 /恐龙
feather 名词	/ˈfɛðə/	羽毛, 羽
meter 名词	/ˈmitəɹ/	計量表 /计量表
archosaur 名词		主龙
asteroid 名词	/ˈæst(ə)ɹɔɪd/	小行星
extinction 名词	/ɪkˈstɪŋkʃən/	滅絕 /灭绝
dominate 动词	/ˈdɑ.məˌneɪt/	主宰, 宰制
weigh 动词	/weɪ/	稱重 /称重
devastate 动词	/ˈdɛv.ə.steɪt/	摧毀 /摧毁, 破壞 /破坏
kilogram 名词	/ˈkɪləɡɹæm/	千克, 公斤
mammal 名词	/ˈmæməl/	哺乳類 /哺乳类, 哺乳動物 /哺乳动物
limb 名词	/lɪm/	肢, 手腳 /手脚
predator 名词	/ˈpɹɛd.ə.tɚ/	掠食者, 天敵 /天敌
thrive 动词	/θɹajv/	繁榮 /繁荣
ecosystem 名词	/ˈikoʊˌsɪstəm/	生態系 /生态系, 生態系統 /生态系统

视频中出现的短语动词

单词	释义
check out 动词	退房
look around 动词	環顧 /环顾
run around 动词	忙碌, 奔忙
take over 动词	接管, 接手

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
现在完成进行时 have/has been + -ing — 以前开始、现在仍在继续的动作	have been evolving · we've been traveling · you've been hanging
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的	was likely caused · wasn't just filled · were forced
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	we've now entered · hasn't appeared · has ever seen

需要注意的发音

说话人用了 25 次缩略和弱读形式，例如 wasn't, we've, you're。请按听到的简短形式来说。

“th” 音: feather /ˈfɛðə/, theropod /ˈθɪɚ.əˌpɑd/, thrive /θɹajv/, warmth /wɔɹmθ/, aftermath /ˈæf.tɚˌmæθ/
“sh” 和 “zh” 音: extinction /ɪkˈstɪŋkʃən/, collision /kəˈlɪʒn̩/, nutritious /nuːˈtɹɪʃəs/, vegetation /ˌvɛd͡ʒəˈteɪʃən/, evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/
长单词——注意重音位置: ecosystem /ˈikoʊˌsɪstəm/, cataclysmic /ˌkætəˈklɪzmɪk/, diversify /daɪˈvɝ.sə.faɪ/, organism /ˈɔɹ.ɡəˌnɪz.əm/, formidable /ˈfɔɹmɪdəbəl/

中文母语者容易读错的音：

/v/ — 不要读成 /w/，上齿轻触下唇: evolve /ɪˈvɑlv/, devastate /ˈdɛv.ə.steɪt/, volcanic /vɔlˈkænɪk/, thrive /θɹajv/, diversify /daɪˈvɝ.sə.faɪ/
词尾辅音 — 要读清楚，后面不要加元音: evolve /ɪˈvɑlv/, asteroid /ˈæst(ə)ɹɔɪd/, extinct /ɪkˈstɪŋkt/, dominate /ˈdɑ.məˌneɪt/, devastate /ˈdɛv.ə.steɪt/
/r/ 和 /l/ 的区别: kilogram /ˈkɪləɡɹæm/, crocodile /ˈkɹɑkədaɪl/, reptile /ˈɹɛp.taɪl/, formidable /ˈfɔɹmɪdəbəl/, evolutionary /ˌiː.vəˈluː.ʃən.ɛɹ.i/

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 dinosaur, feather, meter 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。

影子跟读法: 阅读完整分步指南 →

跟读练习: Evolution of Dinosaurs in 10 Minutes - 通过视频学习英语口语

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