Chemoprevention
[醫]化學預防（癌癥）, 化學預防
??? 情景例句
Do you think the end is all right?
你看結尾還行嗎？
While we were having breakfast,John was talking on the telephone.
當我們正在吃早餐時，約翰正在打電話。
The mondey took the tiger to a big river.
猴子領著老虎來到一條大河邊。