相關(guān)單詞近義詞 safety valve 安全閥, valve 瓣膜, safety device 安全裝置, safety precaution 安全措施, overflow 泛濫, foolproof 不會錯的, guaranteed 保證的, dependable 可靠的, reliable 可靠的臨近詞fail, Failli 返回 fail safe