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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】
specific ultimately glimpse laboratory He said it'll be years before the biosensors hit the fields and that scientists want more research on how this technique will effect the environment.
1. specific adj.具体的 2. ultimately adv. 最终地 3. glimpse v. 一瞥，瞥见 get a glimpse了解 4. laboratory n.实验室 【视听版科学小组荣誉出品】 以上仅供参考,欢迎大家参与讨论~