酗酒成性的人承認飲酒過度是弊多利少，他這樣說實際是自己打自己的嘴巴。 By admitting that excessive drinking does more harm than good, the man who indulged in the practice was condemned out of his own mouth.
守口的人一個嘴巴緊閉的人，尤指能保守秘密的人 A close-mouthed person, especially one who can keep a secret.
她的小嘴巴一噘，眼淚汪汪。 Her little mouth pucker up and tear fille her eyes.
牙科大夫要處置的（患者）嘴巴一般并不處在理想狀態(tài)。 The mouth the dentists work on usually is not in an ideal
