People use their mouths for many things. They eat, talk, shout and sing. They smile and they kiss. In the English language, there are many expressions using the word mouth. But some of them are not so nice.
嘴巴的用途很多，人们用嘴吃饭、谈话、呐喊、唱歌、微笑和亲吻。在英语中，有很多包含嘴这个单词的短语。但其中一些可不太友好。
For example, if you say bad things about a person, the person might protest and say "Do not bad mouth me."
比如，如果你说某人不好的方面，这个人可能会抗议，说“不要说我坏话”
