大学英语： prevent v. 阻止，妨碍，预防

　　prevention n. 预防，妨碍

　　1)Nothing would prevent us from going to help them.(什么也阻止不了我们去帮助他们。)

　　2)The rain prevented its from having the match.(那场雨使我们不能举行比赛。)

　　3)This medicine will prevent you from catching cold. (这种药可以使你预防感冒。)

　　4)Keeping dry is a prevention against cold. (保持干燥可以预防感冒。)

　　5)Prevention is better than cure. (防病胜过医病。)