A：Do you object to drinking black tea, Mr.Zhang?

張先生，你不喜歡喝紅茶嗎?

B：Yes,that is why I never drink it.

是的，所以我永不喝它的。

A：Do you drink green tea,then?

那么你喝綠茶嗎?

B：Very seldom, because tea has tannin which may be harmful to one's health.

很少的，因為茶里有單寧酸，對人的健康是有害的。

A：But if the tea is good and well prepared,it will do much good.

但是好的茶葉，泡得又好，是很有益處的呢。

B：What good is it for?

有什么益處?

A：Not only can it appease one's thirst,but it can also refresh one when tired.

茶不但能夠止渴，又能使疲憊的人提起精神來。

B：That's true,but it must not be allowed to stand long.

那是對的，但是不可以讓它擱得太久。

A：Why is it so?

為什么呢?

B：Because if you drink a kind of tea which has been prepared for some time before,it will do you harm.

因為如果你喝一種放得太久的茶，是沒有好處的。