knife-edges

核心释义

1. 1.

   一种锐利金属刃口(通常为钢制),置于光滑表面,用作摆、秤梁等需要极小摩擦摆动的部件的支点。

   A small piece of metal, usually steel, sharpened to an acute edge or angle, and resting on a smooth surface, serving as the fulcrum of a pendulum, scalebeam, or other piece required to oscillate with minimal friction.

2. 2.

   一种危险的平衡状态,很小的外力即可向任一方打破。

   A precarious balance that could be upset by a very small force in either direction.

3. 3.

   刀的边缘

   Used other than figuratively or idiomatically: the edge of a knife.

一种危险的平衡状态,很小的外力即可向任一方打破。；刀的边缘；刀口；锐利物；刃状物