词典释义：
双语例句
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All holes in the base of the chassis have been counter sunk to protect the screws from damage when going over kerbs or when the car bottoms out over bumps.
所有漏洞，该基地的底盘已沉入柜，以保障螺丝损坏时，尽量多利用路肩或当汽车从谷底超过颠簸。