【Earth&Sky】科学家看生态变化_英语听力练习mp3下载-自然-沪江听力酷

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【Earth&Sky】科学家看生态变化

听力简介：

听写填空,4个单词/词组+1个句子,不用写标号~

Robert Waide: I think the most important trend we’re seeing is change – in many cases, unprecedented change. Change [---1---] driven by modifications of global climate, by changing go-ahead use, and by gain or loss of species.

You're listening to Robert Waide, executive director of the Long-Term Ecological Research Network Office. Scientists at the Network’s 26 study sites collect data on environmental trends around the world.

Robert Waide: I think the most important thing that we are [---2---] , and we need to be concerned about, is this issue of tipping points. That is, ecosystems can be stressed to the point for they tip over to an entirely different kind of system, in other words, a system which has different kinds of behavior and provides different kind of ecosystem services.

[---3---]

Robert Waide: It’s these [---4---] points that we’re not very confident that we can predict yet, because they are dependent on the interaction of many factors.

Still, scientists believe the “tipping” of ecosystems will have largely [---5---] .

Robert Waide: So the open question is whether humans will understand and appreciate these changes, and affect changes in their own behavior to try and head them off.

More with Robert Waide at our website,
I'm Deborah Byrd and this is Earth & Sky, a clear voice for science. We are at E&S.org