Polypropylene is a non-polar high polymer. During the treatment, a polar surface layer is formed which gives rise to a higher adhesion strength.

聚丙烯为非极性的高聚物，只有经过特殊的表面处理使其变为极性表面，才能得到高的粘接强度。

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After a historic, near perfect landing NASA's Phoenix Mars Lander is getting ready to begin testing the polar surface for signs of water and life.

在完成了具有重大历史意义，几近完美的火星登陆后，美国国家航空宇宙航行局的不死鸟号的登陆者准备开始探测北极表面的水、生命的迹象。

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The surface of the treated fibre contains more hydrophilic groups of oxygen and nitrogen. The increase of the number of polar surface groups accounts for the increase of fiber cohesion.

等离子体处理兔毛引起其表面性能变化的原因是由于表面极性基团增加的缘故。

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Independent lines of research involving helioseismology and surface polar fields tend to support their conclusion.

FORBES: To The Horror Of Global Warming Alarmists, Global Cooling Is Here

Nasa spokesman Don Savage said they were not clear about what caused the Mars Polar Lander to disappear as it approached the Martian surface and rejected the earlier claims of a cover-up.

BBC: You are in: Sci/Tech

If a large body of water once existed on the red planet, the remainder of the water must now either be stored below the surface and in the much smaller south polar cap, or have been lost to space.

BBC: By BBC News Online Science Editor Dr David Whitehouse