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SSS 2011-07-20

时间:2011-08-09 05:43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)

 This is Scientific American 60-second Science. I'm Christopher Intagliata. Got a minute? Hey, four eyes.

Let playground tongue more accurate when it applied1 Anableps anableps, a fish related to the garbe. It lives in the blackish water of mangoswan in central of South America in hunts for food of the water surface. Its bozing eyes submerged half way which poses revolution problems. Should those eyes be attuning2 the greenish light drifting the mango, or the yellowish ray drifting up through murky3 water? Well, these fish eyes see both.
 
Anableps doesn't actually has four eyes, just the usual two. But each eye has two pupils, one above water, one below. And each pupil sends incoming visual inform of the different side of the fish's retina. Coming each of the retina adapted produces different light filtering pigments4. So c.. under water ray is primate5 sense a longer way from yellow light. C.. by daily a sense of the short way from green light. The finding appears on a journal biology letters.
 
The entire arrangement makes it easy for this bifocal fish just spot attested6 above from above water or bet it voyage below. For when it comes revolution, the eye's habit.
 
Thanks for the minute for Scientific American 60-s Science. I'm Christopher Intagliata.

点击收听单词发音收听单词发音  

1 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
2 attuning 48046a713ca92089726c20589cdc817a     
v.使协调( attune的现在分词 );调音
参考例句:
3 murky J1GyJ     
adj.黑暗的,朦胧的;adv.阴暗地,混浊地;n.阴暗;昏暗
参考例句:
  • She threw it into the river's murky depths.她把它扔进了混浊的河水深处。
  • She had a decidedly murky past.她的历史背景令人捉摸不透。
4 pigments 90c719a2ef7a786d9af119297e63a36f     
n.(粉状)颜料( pigment的名词复数 );天然色素
参考例句:
  • The Romans used natural pigments on their fabrics and walls. 古罗马人在织物和墙壁上使用天然颜料。 来自辞典例句
  • The original white lead pigments have oxidized and turned black. 最初的白色铅质颜料氧化后变成了黑色。 来自辞典例句
5 primate A1YzI     
n.灵长类(目)动物,首席主教;adj.首要的
参考例句:
  • 14 percent of primate species are highly endangered.14%的灵长类物种处于高度濒危状态。
  • The woolly spider monkey is the largest primate in the Americas.绒毛蛛猴是美洲最大的灵长类动物。
6 attested a6c260ba7c9f18594cd0fcba208eb342     
adj.经检验证明无病的,经检验证明无菌的v.证明( attest的过去式和过去分词 );证实;声称…属实;使宣誓
参考例句:
  • The handwriting expert attested to the genuineness of the signature. 笔迹专家作证该签名无讹。 来自《现代英汉综合大词典》
  • Witnesses attested his account. 几名证人都证实了他的陈述是真实的。 来自《简明英汉词典》
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