6.7托福口语跟读训练

Angela_passions

这几天作业怎么都没有人做啊？要练好口语大家一定要坚持……期末考很累，我知道，所以有什么烦恼不要大意地来跟我说吧，借钱跟失恋就算了~哈哈哈！





What We Can Learn From A Fly’s Ears

This may come as a surprise to you, but most flies don’t havethe ability to hear. However, certain parasitic flies have a hearing system that is so exact inpinpointing a sound’s origin that it rivals the exceptional ears of owls and cats.

This fly’s superb hearing surprised scientists because its tiny body is too small to use the same kindof hearing system that larger animals use. And yet they discovered that the fly was using itshearing to locate the chirps of crickets in order to then deposit parasitic larvae onto the crickets’bodies.

What they found was unlike any other known ear structure, this fly’s eardrums are connected bya bridge of stiff material. Vibrations that travel between the two eardrums enable the fly to pinpointthe origin of a sound as accurately as any other sound system we know of.

And what’s more, this fly’s exceptional hearing system is influencing microphone and hearing aidtechnology. For instance, it could lead to hearing aids that hide within a person’s ear canal and yetare able to gather sound primarily from the direction the listener is facing.

vicky_niu

来自留学微吧-IOS

vicky_niu

来自留学微吧-IOS