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。
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。
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.
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.
刀的边缘
Used other than figuratively or idiomatically: the edge of a knife.
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