The teeth are like razors. Once you get tangled up it will never let you go.其牙齿就像剃刀，一旦咬住你它就绝不会松开。He razors his beard every morning.他每天早晨刮胡子。Some electric razors have reciprocating heads.有些电动剃须刀的刀头是往返运动式的。Now they are producing throwaway razors.他们正在生产一次性剃须刀。