语音讲解：
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　　an expression signifying a treat paid for by the indicated person or group

　　有指明的人或团体请客的表示法

　　Having just learned that he had won the state lottery, Jones walked into the nearest bar and announced,“Bottoms up, everyone! The drinks are on me!”

　　知道他已赢得国家彩券后，琼斯走进最近的一家酒吧里说，“每个人把酒给干了，我请客！”