1. 预防：preventative measure 预防法 | preventing 预防 | prevention measure 预防措施

2. 防止的：preventing collisions 避碰 | preventing 防止的 | Prevention and Cure of Marine Oil Pollution Damage 海洋石油污染损害防治

3. 防范：青少年:the Youngsters | 防范:preventing | 预防:preventing

4. 劝阻：The first thing I'm going to do is to learn English. 我想做的第一事就是学英语. | 41) Preventing 劝阻 | I really disapprove of this decision. 我反对这个决定.