【Earth&Sky】专家敦促农业中使用纳米技术要谨慎_英语听力练习mp3下载-科学-沪江听力酷

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【Earth&Sky】专家敦促农业中使用纳米技术要谨慎

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听写填空,只写填空内容,不抄全文,4个单词/词组+1个句子,不用写标号,注意标点~

Rosalyn Berne of the University of Virginia studies the ethics of nanotechnology, that's the [---1---] of atoms to create new materials. She spoke with us about nanotechnology as applied to agriculture.

Rosalyn Berne: For example, I learned about a product that can be sprayed onto plants that in effect accelerates the [---2---] process. Now that sounds like something that we should not hesitate to do, because it means that we'll get plants growing faster, bigger, more [---3---].

But Berne said there is more to consider.

Rosalyn Berne: But what we don't understand is what happens to that product if and when it washes into the soil, goes down stream, is [---4---] by other species.

Berne said ecosystems are complex and she urges caution.

Rosalyn Berne: What we do may have effects that we cannot in any way imagine when [---5---]. And so it is very important that we take our time.

Thanks today to the USDA Cooperative State Research, Education and Extension Service, the National Research Initiative Program and Cornell University.

I am Joel Block for E&S, a clear voice for science. We are at E&S. org.

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