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美国科学60秒 SSS 2013-06-27

时间:2013-07-25 06:35:44

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(单词翻译)

   Flawless pearls are among the most symmetrical spheres biological organs. But do they get so round? Turns out they turn. Pearls and mollusks such as oysters2 create so-called pearls acs around intrusive3 pieces of grit4. The sac coat the yelten with the layer smooth biker also known as mother of pearls. The growing pearls rotate itself which allows the biker to deposit even they over its surface.By examining pearls under influences and scanning electronic microscope, researcher discovered that the surface actually has soft tooth texture5. As the mollusk1 moves, the pearls flaw so to the next tiny tooth. The works is published in the Journal Lanier. A pearl' motion influences its niker coverage6 and not its finally shape. Depending on its surface pattern, it might turn in a single direction to create a drop or ring, or rotate more freely to form sphere, if defect prevents this motion, the final product will be shapeless. The resulting asymmetrical7 pearls is doomed8 to be booed.


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1 mollusk u6ozk     
n.软体动物
参考例句:
  • I swear I have never seen such a mollusk with thorns all over its body.我敢发誓我从来没有见过这种全身长满棘刺的软体动物。
  • The colour varies with the mollusk and its environment.颜色因母体及其环境的不同而异。
2 oysters 713202a391facaf27aab568d95bdc68f     
牡蛎( oyster的名词复数 )
参考例句:
  • We don't have oysters tonight, but the crayfish are very good. 我们今晚没有牡蛎供应。但小龙虾是非常好。
  • She carried a piping hot grill of oysters and bacon. 她端出一盘滚烫的烤牡蛎和咸肉。
3 intrusive Palzu     
adj.打搅的;侵扰的
参考例句:
  • The cameras were not an intrusive presence.那些摄像机的存在并不令人反感。
  • Staffs are courteous but never intrusive.员工谦恭有礼却从不让人感到唐突。
4 grit LlMyH     
n.沙粒,决心,勇气;v.下定决心,咬紧牙关
参考例句:
  • The soldiers showed that they had plenty of grit. 士兵们表现得很有勇气。
  • I've got some grit in my shoe.我的鞋子里弄进了一些砂子。
5 texture kpmwQ     
n.(织物)质地;(材料)构造;结构;肌理
参考例句:
  • We could feel the smooth texture of silk.我们能感觉出丝绸的光滑质地。
  • Her skin has a fine texture.她的皮肤细腻。
6 coverage nvwz7v     
n.报导,保险范围,保险额,范围,覆盖
参考例句:
  • There's little coverage of foreign news in the newspaper.报纸上几乎没有国外新闻报道。
  • This is an insurance policy with extensive coverage.这是一项承保范围广泛的保险。
7 asymmetrical gO7ye     
adj.不均匀的,不对称的
参考例句:
  • Most people's faces are asymmetrical.多数人的脸并不对称。
  • Folds may be gentle and symmetrical,or sharp and asymmetrical.褶皱可以是平缓而对称的,也可以是陡峭而非对称的。
8 doomed EuuzC1     
命定的
参考例句:
  • The court doomed the accused to a long term of imprisonment. 法庭判处被告长期监禁。
  • A country ruled by an iron hand is doomed to suffer. 被铁腕人物统治的国家定会遭受不幸的。

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