safe guard

柯林斯詞典

1. V-T To safeguard something or someone means to protect them from being harmed, lost, or badly treated. 保護(hù); 保衛(wèi)[正式]
They will press for international action to safeguard the ozone layer. 他們將竭力要求國際行動(dòng)來保護(hù)臭氧層。
2. N-COUNT A safeguard is a law, rule, or measure intended to prevent someone or something from being harmed. 安全條例; 防護(hù)措施
As an additional safeguard against weeds you can always use an underlay of heavy duty polyethylene. 作爲(wèi)另外一種預(yù)防襍草的防護(hù)措施，你可以一直使用一層厚重耐磨的聚乙烯底墊。