(proverb)it's easier to stop something happening in the first place than to repair the damage after it has happened(谚)防胜于治
英语四级真题
Prevention is better than cure.
出自-2012年12月阅读原文
英语六级真题
If you're moderately exercising for 150 minutes a week, as the Centers for disease Control and Prevention recommends, or less than that, you're probably not an extreme athlete.
2019年12月六级真题（第二套）阅读 Section B
There's this peer-to-peer nature of health care these days with a profound opportunity for parents to learn helpful tips, safety and prevention efforts, pro-vaccine messages and all kinds of other messages from other parents in their social communities.
2018年12月六级真题（第三套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
VERB
防止；预防；阻止
To prevent something means to ensure that it does not happen.