名词意思是,牛肉;肌肉;力气;牢骚。动词意思是,抱怨;告发;加强。例句,1、Do you like stewed beef?你喜欢吃炖牛肉吗?2、Africa is exporting beef to Europe.非洲向欧洲出口牛肉。3、He's got plenty of beef.他肌肉发达。4、My beef is that it took too much time.我的抱怨是太花时间了。5、He is f