blade

The chef sharpened the blade of his professional knife before slicing the raw fish.

(Chinese) 厨师在切生鱼片之前，先磨利了他的专业刀具的刀刃。

Be careful when handling the lawnmower, as the spinning blade can be extremely dangerous.

(Chinese) 操作割草机时要小心，因为旋转的刀片可能非常危险。