Regular cleaning may help prevent infection. 定期打扫卫生会有助于预防感染。

If necessary, add a little water to prevent sticking. 有必要的话，加一点点水以免太黏。

prevent sth (from) happening Rubber seals are fitted to prevent the gas from escaping. 装了橡胶圈以防止气体泄漏。

We tried to prevent her, but she was determined to go. 我们设法阻止她，但是她铁了心要走。

prevent sb (from) doing sth The owner is prevented by law from making any major changes. 法律禁止业主进行任何大变动。

She was sure the noise would prevent her sleeping at night. 她肯定那噪声会使她夜间无法入睡。