This is all very well, but the physicist comes along and shows that you never bump into anything: even when you run your head against a stone wall, you do not really touch it.

这当然不错。不过，一个物理学家会过来，他会向你展示，你永远也不会碰撞上任何东西，即使你用你的脑袋猛地撞上了一道石墙，你也不会真正地碰上它！

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They approach rural affairs from an urban viewpoint and often run their heads against a brick wall because they draw up many inappropriate plans subjectively and enforce them arbitrarily .

他们带着城市观点去处理农村，主观地作出许多不适当的计划，强制施行，常常碰了壁。

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"You run a bit against the wall (as a second driver) so this will be different, " said Glock, who missed the final three races of the season after crashing during qualifying for the Japanese Grand Prix.

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Moreover, in reforming the state sector, China's leaders have run up against a brick wall.

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Angel Pagan hit an RBI double and two-run single for San Francisco, also making a great leaping catch against the center-field wall.

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