休閑對話：不勤刷牙的悲慘下場

Dave: How many times do you brush your teeth every day,David?

你一天刷幾次牙，大衛(wèi)?

David: Once.

一次。

Dave: No wonder you often get a toothache,brush your teeth twice a day and don't eat too much candy.

難怪你老是牙疼。一天刷兩次牙，還有別吃太多糖果。

David: OK,I will.

好，我會的。