He slammed the counter with the flat of his hand.

他用手掌猛击柜台。

《柯林斯英汉双解大词典》

For immediate relief with your current shoes, try adding a flat over-the-counter insole underneath your sockliner to make the fit narrower without affecting the overall length.

要让你现在的鞋子马上改善，试着在鞋垫下面塞一片平坦的东西来让鞋子变窄，但不要影响它的长度。

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In addition, how to use this counter to realize Gray Display by PWM in Driving Circuit of Flat Panel Display has been discussed.

另外，还介绍了该计数器在一种平板显示器驱动电路中是如何通过脉宽调制实现灰度显示的。

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Sometimes this leads to counter-intuitive behaviour, such as consumers preferring a flat all-you-can-eat fee when pay-as-you-go would be cheaper.

ECONOMIST: So many ways to pay online