【Earth&Sky】纳米传感器帮助农民监测庄稼_英语听力练习mp3下载-科学-沪江听力酷

后台管理反馈贡献

【Earth&Sky】纳米传感器帮助农民监测庄稼

听力简介：

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~

Aaron Strickland, a chemist at Cornell University is using nanotechnology – the science of the very small – to develop what he calls a biosensor. He says this sensor should help farmers manage their crops.

Aaron Strickland: The [---1---] idea was to incorporate sensors into pesticide spray, so that you can monitor, you know, how well was the crop field sprayed for pests, for example, or adding nutrients to the crop field.

Here's how it works. Small amounts of gold nanoparticles – a few billionths of a meter in size – are mixed with crop spray. That addition [---2---] allows a hand-held laser scanner to pick up a signal of the fertilizer or pesticide. Strickland said knowing what additives are on crops should give farmers a better idea of when to spray again.

Aaron Strickland: So can they get a [---3---] into their crop field without having to actually take samples, monitor the chemicals they've just sprayed, or send them back to a [---4---].

[---5---]

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

【视听版科学小组荣誉出品】