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SSS 2012-02-01

时间:2012-03-19 05:46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)

 It's tough to be a machine in the desert. Particles of dirty sands walk their way in to moving parts where they break turbine's motors pipes on other equipment.To avoid the costly1 warranty2, researches are taking lessons from a desert native, the yellow fat scorpion3. Scorpion protect their bodies with exo-skeletons in order to minimize rubbing from air-born sand. The pattern on this armor modify the way that air flow over the scorpion's back. The researches scan the scorpion's body and use the natural pattern in inspiration for a variety of surfaces. With the computer model to simulate the airflow over the digital surfaces and wind tunnel for testing the physical samples, the researches are trying to develop the best texture4 for avoiding sand damage. Their work is in the Material Science Journal Annual. Although all texture surfaces feel better than smooth ones, one type of pattern resist the erosion best. Small dews cut the 30 degree angle to direction of the airflow. The machine whose surfaces are engraved5 with this texture should fight off the erosion like the scorpion do, where smoother equipment comes to the sting of sand.

This post was generated by put listening repetition system,  Check the original dictation thread!

点击收听单词发音收听单词发音  

1 costly 7zXxh     
adj.昂贵的,价值高的,豪华的
参考例句:
  • It must be very costly to keep up a house like this.维修这么一幢房子一定很昂贵。
  • This dictionary is very useful,only it is a bit costly.这本词典很有用,左不过贵了些。
2 warranty 3gwww     
n.担保书,证书,保单
参考例句:
  • This warranty is good for one year after the date of the purchase of the product.本保证书自购置此产品之日起有效期为一年。
  • As your guarantor,we have signed a warranty to the bank.作为你们的担保人,我们已经向银行开出了担保书。
3 scorpion pD7zk     
n.蝎子,心黑的人,蝎子鞭
参考例句:
  • The scorpion has a sting that can be deadly.蝎子有可以致命的螫针。
  • The scorpion has a sting that can be deadly.蝎子有可以致命的螫针。
4 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。
5 engraved be672d34fc347de7d97da3537d2c3c95     
v.在(硬物)上雕刻(字,画等)( engrave的过去式和过去分词 );将某事物深深印在(记忆或头脑中)
参考例句:
  • The silver cup was engraved with his name. 银杯上刻有他的名字。
  • It was prettily engraved with flowers on the back. 此件雕刻精美,背面有花饰图案。 来自《简明英汉词典》
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