preventative effect

• 预防作用

preventative effect的用法和样例：

例句

1. Vaccination has a preventive effect.
   种了一次牛痘，起预防作用。
2. In this paper, the authors studied systematically on preventive effect of mimosa tannin on hexavalent-chromium in leather.
   系统地研究了荆树皮栲胶对皮革中六价铬的预防作用。