It is mainly because the polar force in surface tension decreases which results from the increase of CH3 nonpolar group on the surface of silica particles shown from FTIR analysis.

表面润湿性降低， 主要是表面张力中极性力的贡献， FTIR分析表明， 这是由于二氧化硅颗粒表面-CH3非极性基团增加所致；

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High in the polar regions, the lines of magnetic force point almost straight upwards.

在极地的高空，磁力线几乎是垂直指向上方。

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The report warns that a temperature rise if up to 5.8 c, with the warming of the oceans and melting of polar icecaps, will force sea levels to rise by as much as 3ft.

报道警告说，若地球气温升高5．8摄氏度，随着海洋变暖和极地冰帽融化，海平面将升高3英尺。

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The Center for Biological Diversity was one of three environmental groups, including Greenpeace and the Natural Resources Defense Council, that sued the federal government to force a decision on the status of the polar bears.

CNN: Polar bear now listed as 'threatened' species