Your parents gave you a new cell phone , but you want a more expensive one ? don ' t look a gift horse in the mouth 你父母送你一支新的手机，你却想要一支更名贵的？别挑三拣四了啦！
Jock : oh , come on . don ' t look a gift horse in the mouth . i know it ' s ok because i was his sister driving it last week 哈利：是啊，他真好，但我不知道该不该借用。他那辆车比我那辆还要旧。
To look a gift horse in the mouth - when buying a horse , you should look in its mouth . why ? because a horse ' s teeth tells its age . but if someone gave you a horse as a present , would you look at its teeth ? no , that would be impolite 买马的时候要看看它的嘴巴。为什么？因为从马的牙齿可以看出它的年龄。不过如果有人送你一匹马作为礼物，你会不会检查它的牙齿呢？不会，那样很不礼貌。
