TPO55综合口语Task4阅读原文+听力原文+mp3+范文下载

TPO55综合口语Task4阅读原文+听力原文+mp3+范文下载

以下是TPO55综合口语Task4阅读原文：

An ecosystem is a local environment with its complex community of organisms functioning together as a unit. An ecosystem can be damaged by natural disasters or by human activity. If the ecosystem has a limited variety of species, then destroying even one species of plant or animal can change the ecosystem forever. A resilient ecosystem, however, is able to restore itself to its original, pre-disturbance condition. Resilience in an ecosystem is possible when the ecosystem is populated by a large variety of species: if one species is eliminated by a disturbance, other species are able to take the place of that species, which allows the ecosystem to avoid long-term change.

以下是TPO55综合口语Task4听力原文：

Now listen to part of a lecture on this topic in an ecology class.

Okay, this happened a few years back. There was this healthy coral reef in the Pacific Ocean. You know how gorgeous coral reefs are with all the red, pink and orange. And it had a huge variety of species, um, of fish and plants, that it protected and provided with food. Then the sea water got polluted because the ships built a large amount of diesel fuel. The pollution caused a species of fish to die out. And this fish that died out used to eat a particular type of ocean plant called algae.

Now, of course, if there aren’t any fish to eat algae, the algae will grow out of control and there will be too much algae which is very bad for coral. But that did not 。。。。。此处省略约500字

题目：Using the coral reef as an example,explain what it means for an ecosystem to be resilient.

以下是TPO55综合口语Task4范文：

The reading is about Ecosystem Resilience, which means that when an ecosystemhas a large variety of species: if one species is eliminated by a disturbance, otherspecies are able to take the place of that species, which allows the ecosystem toavoid long-term change.

In the lecture, the professor gives an example to explain this. Several years ago,there was a healthy coral reef in the Pacific Ocean along with a huge variety of fishand plants. But once, 。。。。有省略。

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