adjective · to speak or sing alternately, especially in a performance such as cross-talk or a duet

他们合作表演了一段精彩的对口相声。

adjective · to suit one's specific taste or appetite in food

这顿丰盛的家乡饭他吃得很对口。

verb · to be fit for the requirements of a specific job, task, or field of study

他希望能找一份专业对口的工作。