He showed him how to blow into the ivory mouthpiece.他给他演示如何吹奏象牙吹口乐器。

He shouted into the mouthpiece.他冲着话筒大嚷。

He became the mouthpiece of the moderate leadership.他成为温和派领导的代言人。

Their mouthpiece is the vice-president.他们的代言人是副总统。

He is little more than a convenient mouthpiece for the Prime Minister's own economic views.他或许仅被视为首相个人经济观点的传声筒。