相关单词近義詞 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 保証的, dependable 可靠的, reliable 可靠的臨近詞fail, Failli相似詞faggotry, fah, Fahrenheit, fail, failed, failed state, failing, failure, 返回 fail-safe