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SSS 2011-07-29

时间:2011-08-09 05:55来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)

 More than 16 mammals species like the famous fly squirrel have adapted the ability to sail from tree to tree, thrilling Yes, but what is the evolutionary1 advantages.

 
One theory suggests gliding2 saves energy, so researchers test that idea using colugos, mammals from southeast Asia that turns into giant skin sails when they stretch out their legs. The scientist place accelerometer on the back of 16 compliant3 colugos, the data packed revealed that each colugo glide4 in average a quarter mile each night, but gliding isn't as effortless as it looks, researchers calculation suggests that flying actually requires one and half times energy than conventional traverse, that's because colugo prepare for a launch by climbing higher up to the tree, and climbing is a lot more strenuous5 than walking. That finding appears in the Journal experimental Biology. 
 
So why do it, the upside is speed, colugo can sail ten time faster than they tightrope6 through the canopy7, which leave more time to snack, plus leaping in the air is easy get away from predators8, in the end, it's not different from human fly,cost more, way faster.  

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1 evolutionary Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
2 gliding gliding     
v. 滑翔 adj. 滑动的
参考例句:
  • Swans went gliding past. 天鹅滑行而过。
  • The weather forecast has put a question mark against the chance of doing any gliding tomorrow. 天气预报对明天是否能举行滑翔表示怀疑。
3 compliant oX8zZ     
adj.服从的,顺从的
参考例句:
  • I don't respect people who are too compliant.我看不起那种唯命是从,唯唯诺诺的人。
  • For years I had tried to be a compliant and dutiful wife.几年来,我努力做一名顺从和尽职尽职的妻子。
4 glide 2gExT     
n./v.溜,滑行;(时间)消逝
参考例句:
  • We stood in silence watching the snake glide effortlessly.我们噤若寒蝉地站着,眼看那条蛇逍遥自在地游来游去。
  • So graceful was the ballerina that she just seemed to glide.那芭蕾舞女演员翩跹起舞,宛如滑翔。
5 strenuous 8GvzN     
adj.奋发的,使劲的;紧张的;热烈的,狂热的
参考例句:
  • He made strenuous efforts to improve his reading. 他奋发努力提高阅读能力。
  • You may run yourself down in this strenuous week.你可能会在这紧张的一周透支掉自己。
6 tightrope xgkzEG     
n.绷紧的绳索或钢丝
参考例句:
  • The audience held their breath as the acrobat walked along the tightrope.杂技演员走钢丝时,观众都屏住了呼吸。
  • The tightrope walker kept her balance by holding up an umbrella.走钢丝的演员举着一把伞,保持身体的均衡。
7 canopy Rczya     
n.天篷,遮篷
参考例句:
  • The trees formed a leafy canopy above their heads.树木在他们头顶上空形成了一个枝叶茂盛的遮篷。
  • They lay down under a canopy of stars.他们躺在繁星点点的天幕下。
8 predators 48b965855934a5395e409c1112d94f63     
n.食肉动物( predator的名词复数 );奴役他人者(尤指在财务或性关系方面)
参考例句:
  • birds and their earthbound predators 鸟和地面上捕食它们的动物
  • The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
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