preventative effect是什么意思 preventative effect怎么读
preventative effect的用法和样例
- Vaccination has a preventive effect.
种了一次牛痘，起预防作用。 - 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。
展开更多
