时文阅读与练习.docx

时文阅读与练习

Smallesteverflyingstructurewithnoengines

史上最小飞行器诞生

来自美国西北大学的一个研究团队，通过研究借风播散的种子，成功研发出迄今为止最小的微型飞行器。

1?Its?raining?microchips.?One?day，?they?could?float?gently?through?the?air?while?gathering?environmental?data，?land?on?the?ground?and?then?disappear?when?their?work?is?done.?That?s?the?future?a?team?of?engineers?sees?for?what?they?re?calling?

“microflier”，?a?tiny?winged?microchip?with?designs?inspired?by?nature.

2?The?accomplishment?belongs?to?a?team?of?scientists?at?the?Northwestern?University?in?Illinois，?who?developed?the?microflier，?a?flying?microchip?that?spins?like?a?helicopter.?This?thing?is?the?size?of?

a?grain?of?sand?but?with?small?wings?and?an?aerodynamic?（流线型的）?design?that?allows?it?to?fall?in?a?controlled?manner?thanks?to?its?barely?visible

?Propellers.

3?How?does?that?work？?Well，?the?engineers?used?nature?s?“manual”?to?get?

their?inspiration?for?the?microflier，?analyzing?the?behavior?of?various?types?of?

wind?spread?seeds.?Instead?of?using?a?motor?or?engine，?the?tiny?flying?

microchip?uses?the?power?of?wind?to?catch?a?flight，?spinning?across?the?

ground?at?a?low?speed.?It?is?a?stable?flight，?and?the?microflier?can?stand?in?the?air?for?a?long?time，?which?is?why?it?could?prove?to?be?useful?

for?a?variety?of?applications.

4?While?nature?has?designed?seeds?with?very?sophisticated?aerodynamics，?the?Northwestern?team?claims?its?microflier?is?better，?as?it?is?even?smaller?and?its?

structure?allows?it?to?fall?with?more?stable?paths?and?at?slower?speeds?than?

equivalent?（相當的）?seeds?from?plants?or?trees.

5?The?engineers?built?the?flying?structure?to?be?used?for?purposes?such?as?

population?surveillance，?pollution?monitoring，?disease?tracking，?to?give?just?a?few?examples.?And?while?this?might?look?like?a?simple，?limited?device?right?now，?researchers?see?its?potential?for?becoming?a?highly?functional?electronic?device.?The?microflier?can?be?equipped?with?really?sophisticated?technology，?such?as?tiny?sensors，?antennas?（天线）?for?wireless?communication，?o