跟读练习: The continents are moving. When will they collide? - Jean-Baptiste P. Koehl - 通过YouTube学习英语口语
C2
In the early 20th century, a meteorologist named Alfred Wegener noticed striking similarities between the coasts of Africa and South America.
35 句
如果句子过短或过长，请点击 Edit 进行调整。
1
In the early 20th century, a meteorologist named Alfred Wegener noticed striking similarities between the coasts of Africa and South America.
2
These observations led him to propose a controversial new theory: perhaps these and many other continents had once been connected in a single, gigantic landmass.
3
Wegener’s Theory of Continental Drift directly contradicted the popular opinion that Earth’s continents had remained steady for millennia, and it took almost 50 years for his advocates to convince the larger scientific community.
4
But today, we know something even more exciting— Pangea was only the latest in a long lineage of supercontinents, and it won’t be the last.
5
Continental Drift laid the foundation for our modern theory of plate tectonics, which states that Earth’s crust is made of vast, jagged plates that shift over a layer of partially molten rock called the mantle.
6
These plates only move at rates of around 2.5 to 10 centimeters per year, but those incremental movements shape the planet's surface.
7
So to determine when a new supercontinent will emerge, we need to predict where these plates are headed.
8
One approach here is to look at how they’ve moved in the past.
9
Geologists can trace the position of continents over time by measuring changes in Earth’s magnetic field.
10
When molten rock cools, its magnetic minerals are “frozen” at a specific point in time.
11
So by calculating the direction and intensity of a given rock’s magnetic field, we can discover the latitude at which it was located at the time of cooling.
12
But this approach has serious limitations.
13
For one thing, a rock’s magnetic field doesn’t tell us the plate’s longitude, and the latitude measurement could be either north or south.
14
Worse still, this magnetic data gets erased when the rock is reheated, like during continental collisions or volcanic activity.
15
So geologists need to employ other methods to reconstruct the continents’ positions.
16
Dating local fossils and comparing them to the global fossil record can help identifying previously connected regions.
17
The same is true of cracks and other deformations in the Earth's crust, which can sometimes be traced across plates.
18
Using these tools, scientists have pieced together a relatively reliable history of plate movements, and their research revealed a pattern spanning hundreds of millions of years.
19
What’s now known as the Wilson Cycle predicts how continents diverge and reassemble.
20
And it currently predicts the next supercontinent will form 50 to 250 million years from now.
21
We don’t have much certainty on what that landmass will look like.
22
It could be a new Pangea that emerges from the closing of the Atlantic.
23
Or it might result from the formation of a new Pan-Asian ocean.
24
But while its shape and size remain a mystery, we do know these changes will impact much more than our national borders.
25
In the past, colliding plates have caused major environmental upheavals.
26
When the Rodinia supercontinent broke up circa 750 million years ago, it left large landmasses vulnerable to weathering.
27
This newly exposed rock absorbed more carbon dioxide from rainfall, eventually removing so much atmospheric CO2 that the planet was plunged into a period called Snowball Earth.
28
Over time, volcanic activity released enough CO2 to melt this ice, but that process took another 4 to 6 million years.
29
Meanwhile, when the next supercontinent assembles, it's more likely to heat things up.
30
Shifting plates and continental collisions could create and enlarge cracks in the Earth’s crust, potentially releasing huge amounts of carbon and methane into the atmosphere.
31
This influx of greenhouse gases would rapidly heat the planet, possibly triggering a mass extinction.
32
The sheer scale of these cracks would make them almost impossible to plug, and even if we could, the resulting pressure would just create new ruptures.
33
Fortunately, we have at least 50 million years to come up with a solution here, and we might already be onto something.
34
In Iceland, recently conducted trials were able to store carbon in basalt, rapidly transforming these gases into stone.
35
So it’s possible a global network of pipes could redirect vented gases into basalt outcrops, mitigating some of our emissions now and protecting our supercontinental future.
下载应用
AI 为你说出的每个句子打分
TRENDING
热门
背景与背景信息
在20世纪初，一位气象学家阿尔弗雷德·韦根尔（Alfred Wegener）注意到非洲和南美洲海岸之间的惊人相似性。这一观察促使他提出了一种颇具争议的理论：这些大陆可能曾经连接成一个巨大的陆地块。韦根尔的大陆漂移理论直接与当时流行的观点相矛盾，后者认为地球的大陆在数千年来一直保持稳定。尽管他的支持者花费了近50年时间来说服更广泛的科学界，但如今我们知道，盘古大陆只是众多超级大陆中最新的一位，而它并非最后一位。这一理论为现代板块构造理论奠定了基础，指出地球的地壳由巨大的、不规则的板块构成，这些板块在部分熔融的岩石层（称为地幔）上移动。
日常交流的五个常用短语
- 大陆漂移理论（Continental Drift Theory）
- 板块构造（Plate Tectonics）
- 地壳裂缝（Cracks in the Earth's Crust）
- 温室气体（Greenhouse Gases）
- 超级大陆（Supercontinent）
逐步跟读指南
想要提高英语发音，可以通过shadowspeak方法进行有效的练习。以下是一些针对本视频的困难之处的逐步指南：
- 精听对话：首先，反复播放视频，仔细聆听演讲者的发音和说话速度。注意每一个词的发音方式，特别是那些与主题相关的专业术语。
- 慢速模仿：在慢速播放中进行模仿。你可以在shadowing site找到适合的工具将视频的速度减慢，这样能更专注于单个词的发音。
- 分段练习：将视频分成小段，每段约10-15秒，逐一进行跟读。在每一段结束后，暂停并重复所听到的内容，确保发音准确。
- 录音自我检测：使用手机录音工具记录下自己的声音，然后与原视频中的发音进行对比，注意发音的差异，必要时进行调整。
- 不断重复：每天安排固定时间进行练习，通过重复不断强化记忆，以逐渐提高你的英语发音水平。
通过这些练习，结合对视频内容的理解，你将能够在英语交流中更加自信，并有效提高你在发音上的表现。
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。