对话原文
Lilly: Thank you so much for taking me out to dinner.
Martin: It's the least I could do. You've babysat so much for me recently.
Lilly: It was my pleasure. Your baby's such a doll.
Martin: I'm glad you two get along.
Lilly: Can I at least help you pay a little?
Martin: If you really want to, I guess you could pick up the tip.
Lilly: OK. How much should that be?
Martin: You don't tip in China?
Lilly: No, not at all, so I have no idea how much to pay.
Martin: In restaurants, fifteen percent of the bill is considered pretty standard.
Lilly: What if the service is really bad?
讲解：
1. 对话中，Martin请Lilly到一家餐馆吃饭。既然今天我们说的是小费问题，tip 这里作名词表示“小费”，比如说，I left a tip on the table. 我把小费放在桌子上了。
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古今“食蟹”之“十大名嘴”