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The rougher the surface , the greater the friction .

物体表面越粗糙，产生的摩擦力越大。

Nation states live in a rougher world of realpolitik .

成员国则在更加艰难的现实政治世界中生存。

Such treatment of the media is common during china visits of foreign heads of government , but thursday 's incident was rougher than usual .

在外国政府首脑访华期间，中国如此对待媒体十分常见，但中方在周四的行为比往常更为粗暴。

As his presidency turned rougher , so did the comparisons .

随着他的总统任期变得困难，这种类比也随之困难了起来。

The downturn bolstered the conviction among some economists that gdp was the rougher of the measures of economic activity .

这次下滑让一些经济学家更加相信gdp是一种衡量经济活动的较粗略的标准。