1N-COUNT (电话的)话筒,送话器 The mouthpiece of a telephone is the part that you speak into. (电话的)话筒,送话器
He shouted into the mouthpiece.
他对着电话话筒大叫。
2N-COUNT (乐器的)吹口;(其他装置的)衔口,嘴儿 The mouthpiece of a musical instrument or other device is the part that you put into your mouth. (乐器的)吹口;(其他装置的)衔口,嘴儿
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。
...clamping the mouthpiece of my snorkel tightly between my teeth.
我紧咬水下呼吸管的接口
3N-COUNT [usually with poss]发言人;代言人;喉舌 The mouthpiece of an organization or person is someone who informs other people of the opinions and policies of that organization or person. 发言人;代言人;喉舌
Their mouthpiece is the vice-president.
他们的副总裁是他们的代言人。
He might be considered little more than a convenient mouthpiece for the Prime Minister's own economic views.