Which one is weighter, one pound of gold and one pound of cotton?
一磅黄金和一磅棉花那个更重？
The result indicates that the pollution of surface water in Liaohe river basin is mainly the organic pollution, the point source polluted is weighter than the surface pollution.
结果表明：辽河流域地表水水质污染以有机污染为主，点源污染重于面源污染。
When under the same speed, if the axle load gets weighter, the adhesion coefficient increases as the ratio of the mean asperities contact pressure to the total pressure becomes bigger.
相同速度下，轴重较大，粗糙峰接触压力占总压力的比值也越大，此时粘着系数也较大。
When under the same speed, if the axle load gets weighter, the adhesion coefficient increases as the ratio of the mean asperities contact pressure to the total pressure becomes bigger.
相同速度下，轴重较大，粗糙峰接触压力占总压力的比值也越大，此时粘着系数也较大。
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