There are no flip turns to negotiate in marathon swimming, which is usually held in lakes and oceans, and the upper body is more important than the legs.

这种马拉松式游泳一般在湖泊或海洋中进行，不需要突然发力和转身，而且上半身的动作比腿部更关键。

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At the push of a button the fish are fed, and a flip of a switch turns on the sparkling underwater lights.

按一下按钮就可以喂鱼，而轻轻旋一下开关就可以打开水下明亮的大灯。

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Obviously, this flip also turns the traditional notion of hierarchy on its head.

这显然颠覆了传统的层级结构观念。

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Initially open with glass walls, the master-bedroom suite can be closed off from the rest of the home with a type of glass that turns from clear to opaque at the flip of a switch.

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