To safeguard something or someone means to protect them from being harmed, lost, or badly treated.
例句
They will press for international action to safeguard the ozone layer...他們將督促國際社會采取行動保護臭氧層。The interests of minorities will have to be safeguarded under a new constitution...新憲法必須能保護少數群體的利益。
N-COUNT
預防性條款(或法規);保障措施
A safeguard is a law, rule, or measure intended to prevent someone or something from being harmed.
例句
Many people took second jobs as a safeguard against unemployment...許多人為防失業都干兩份工作。A system like ours lacks adequate safeguards for civil liberties.我們這樣的制度缺乏有效保護公民自由的條款。