他用短剑刀口迅速将锁撬开。

He snapped the little lock with the blade of his stiletto.

如是重复几次，直至刀口锋利、崭齐，刀面光亮如镜。

So repeated several times, until the blade sharp, come together, knife surface bright as a mirror.

他的喉咙血淋淋的，刀口很深，几乎都要被斩首了。

His bloody throat had been cut so deeply that he was nearly decapitated.

主刀口区是呈凸弧狭条形切割带，用于切片切丝；

The main knife-edge area is a convex strip-shaped cutting belt, and is used to cut into sheets and threads;

复梁式双盘等臂天平，采用钢带弹性作支撑，无刀口磨损现象发生。

This type of equal arm balance with double beam and pan adopts flexible steel band as support without abrasion to the edges of the knife.