『新东方在线托福口语』为托福考生准备了ETS托福TPO/Official 42 Task 4口语练习：&nbsp;
 
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 Using the example of th原文题目答案解析，TPO/Official 42 Task 4口语原文范文音频翻译。

托福TPO/Official 42 Task 4口语原文独立/综合口语题目答案解析-范文音频翻译-新东方托福官方网校手机版

旁白：来听一节环境研究课讲座的一部分。

Narrator: Now listen to part of a lecture in an Environmental Studies class.

教授：当发生重大气候变化时，从生物学角度讲会发生什么？

Professor: What happens biologically speaking when a major climate change occurs?

好吧，科学家们普遍认为动物和植物物种的灭绝是很有可能的结果。

Well, scientists generally agree that the extinction of various animal and plant species is one very likely effect.

一个例子是35,000年前一种叫雷鸟的澳大利亚大鸟的消失。

An example is the disappearance 35,000 years ago of a giant Australian bird called the thunderbird.

Now these birds were so big they couldn't fly.

许多科学家相信，正是气候的变化导致了这种物种的灭绝。

many scientists are convinced that it was a change in climate that caused this species to become extinct.

这就是为什么科学家认为这是气候变化的原因。

Here is why scientists think it was a climate change.

研究人员已经在同一个地方发现了大量35,000年前的雷鸟骨骼。

Researchers have discovered an enormous number of 35,000-year-old thunderbird bones all together in one spot.

这些骨头是在一个古老的干涸的湖泊附近发现的。

The bones were found near an ancient dried-up lake.

很少能在同一个地方找到这么多的骨头，

Now it's really rare to find so many bones from the same species in one place,

所有这些35,000年前的雷鸟骨头都聚集在这个干涸的湖泊附近。

you have all these 35,000-year-old thunderbird bones all together near this dried-up lake.

好吧，许多科学家认为澳大利亚气候的变化可能是这背后的原因。

Well, many scientists believe that a change in the Australian climate maybe behind this.

他们的假设是，他们认为在很长的干旱时期，

Their hypothesis is they think that during a very long dry period,

the birds may have flocked together at this lake.

动物倾向于被最后剩下的水源所吸引。

animals tend to gravitate towards the last few remaining water sources.

那些聚集在那里的动物，它们会死掉。

the animals that have gathered there, well, they die.

他们发现骨头的地方，是在干旱期间最后的淡水来源的地方。

where they found the bones was one of the last remaining sources of fresh water during the drought.

这就是所有这些鸟聚集的地方。

So that's where all these birds gathered.

但最终，湖水干涸了，好吧，就是这样。

But eventually the lake dried up, and well, that was it.

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<img src="/upload/image/1516853599103.jpg">
 &nbsp;&nbsp;
 Using the example of the thunder bird, explain a possible effect of a major climate change.
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