首页
登录
职称英语
Mighty Flighty A fly can do one thing extremely well:
Mighty Flighty A fly can do one thing extremely well:
游客
2024-08-10
6
管理
问题
Mighty Flighty
A fly can do one thing extremely well: fly. (86)
Recently a team of British scientists declared that the common housefly is the most talented aerodynamicist on the planet, superior to any bird, bat, or bee.
A housefly can make six turns a second; hover; fly straight up, down, or backward; do somersaults; land on the ceiling; and perform various other show-off maneuvers. And it has a brain smaller than a sesame seed.
Michael Dickinson, who studies fly flight in his lib at Cahech, says the housefly isn’t actually the best flier. ’Hoverflies are the be-all and end-all,’ he says. (87)
They can hover in one spot, hurtle through the air to another location, and then race back to their original hovering point precisely.
Scientists, engineers, and military researchers want to know how creatures with such small brains can do that. Maybe they could reverse-engineer a fly to make a robotic device that could reconnoiter dangerous places, such as earthquake zones or collapsed mines.
Dickinson’s laboratory works with fruit flies. Researchers put them in chambers and manipulate the visual field, filming the flies in super-slow motion, 6,000 frames a second. Dickinson is interested in knowing how flies avoid collisions. He has found that certain patterns, such as 90-degree turns, are triggered by visual cues and two equilibrium organs on their backs that function like a gyroseope.
Flies have only a dozen muscles for maneuvering, but they’re loaded with sensors. In addition to their compound eyes, which permit panoramic imagery and are excellent at detecting motion, they have wind-sensitive hairs and antennae. They also have three light sensors, called ocelli, on the tops of their heads, which tell them which way is up. Roughly two-thirds of a fly’s entire nervous system is devoted to processing visual images. They take all this sensory data and boil it clown to a few basic commands, such as ’go left’ and ’go right.’
(88)
Imagine if you didn’t utter an opinion until you had read hundreds of books, magazines, newspaper articles, and blogs, and then issued a statement based on a few basic notions. That’s how a fly approaches flying.
Only the fly is a speed reader. The information processing takes a fraction of a second. Researcher Rafal Zbikowski of Cranfield University in Shrivenham, England, calls this mode of operation a ’sensor-rich feedback control paradigm.’
(89)
Given that flies have evolved for hundreds of millions of years (and that they were the first animals to take to the air), we shouldn’t be surprised that they’re such good fliers.
’They just don’t have brains like ours. Studying flies,’ says Dickinson, ’is like traveling to another planet.’ [br]
选项
答案
假如苍蝇已经进化了数亿年(并且它们是最早存在于空气中的动物),那我们就不会为它们如此高超的飞行技能而惊叹了。
解析
(evolve进化,发展。hundreds of millions of years数亿年。take to适应,沉迷于。)
转载请注明原文地址:https://tihaiku.com/zcyy/3713963.html
相关试题推荐
MightyFlightyAflycandoonethingextremelywell:
MightyFlightyAflycandoonethingextremelywell:
MightyFlightyAflycandoonethingextremelywell:
MightyFlightyAflycandoonethingextremelywell:
Theregionwasextremelybeautiful.______Gerardcouldnotimaginespendingthe
OnlyoutsidetheEarth’satmosphere______toattainextremelyhighvelocities.A
Astronomershavelearnedthatthespectaculartailsofcometsareextremelytenu
Thiskindofvegetableisextremelyexpensiveinwinterbecauseitis______.A、
随机试题
CoffeewasbelievedbysomeChristianstobethe【B1】______’sdrink.PopeVin
除会计师事务所外,从事代理记账业务的机构必须持有代理记账许可证书。该代理记账许可
配电装置室及变压器室的门宽度应按最大不可拆卸部件宽度加()rn考虑。A.0.
A.速率为v2的各分子的总平动动能与速率为v1的各分子的总平动动能之差 B.速
回答有关沥青路面渗水测试的问题。(2)关于密封材料的说明正确的有()。A.
马克思说:“再生产科学所必要的劳动时间,同最初生产科学所需要的劳动时间是无法相比
2012年上半年,内地对台湾地区进出口总值为()亿美元。 A.125.5
使用暴力非法拘禁致人重伤、死亡的,应( )。 A.按照非法拘禁罪从重处罚
银行汇票金额以中文大写和阿拉伯数字同时记载,当二者不一致时,该票据( )。A.
根据《公司法》的规定,下列关于公积金的表述中,正确的有()。A.公积金可用
最新回复
(
0
)