prevent /prɪˈvɛnt/ CET4 TEM4 ( preventing, prevented, prevents )

• 1. 

  V-T To prevent something means to ensure that it does not happen. 预防

  例：

  These methods prevent pregnancy.

  这些方法预防怀孕。

  例：

  Further treatment will prevent cancer from developing.

  进一步治疗将预防癌症恶化。

• 2. 

  prevention N-UNCOUNT 预防

  例：

  ...the prevention of heart disease.

  …心脏病的预防。

• 3. 

  V-T To prevent someone from doing something means to make it impossible for them to do it. 阻止

  例：

  He said this would prevent companies from creating new jobs.

  他说这将阻止各公司创造新的职位。

  例：

  Its nationals may be prevented from leaving the country.

  其公民可能会被阻止离开该国。