said to politely accept an offer of food or drink

(用于礼貌地接受)可以吃点，可以喝些

"There's plenty more cake if you'd like another piece."

“如果你想再来一块，这儿还有很多蛋糕呢。”

"I don't mind if I do."

“那我就不客气了。”

"Would you like another cup of coffee?"

你还想再来一杯咖啡吗?

"Thank you: I don't mind if I do."

谢谢，那我就不客气了。