Loosen the bolt so the bars can be turned.

松开螺栓，这样那些木板就能被翻过来了。

《柯林斯英汉双解大词典》

The design of the bolt head insures that the bolt will not slip or rotate when the rubber is turned.

这种设计确保了在旋转橡胶的时候螺栓不会滑动或旋转。

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Fastened with eyelet bolt, it can be turned on quickly, installed and maintained conveniently.

采用活节螺栓紧固，能快速开启，便于安装与维护。

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Having proved himself to be the fastest man on earth over both distances, attention has now turned to whether Bolt might race over 400m in the future.

BBC: Bolt switches focus to relay gold