0 the part of a phone, musical instrument, or other device that goes near or between the lips -- (电话的)送话口,话筒;(乐器的)吹口
1 a person or a newspaper that only expresses the opinions of one particular organization -- 传声筒;代言人;喉舌
This newspaper is just a Republican mouthpiece. 这家报纸只不过是共和党的传声筒。