劍橋詞典very unlikely to fail 萬(wàn)無(wú)一失的，萬(wàn)全的 a fail-safe plan 萬(wàn)無(wú)一失的計(jì)劃 If something is fail-safe, it has been designed so that if one part of it does not work , the whole thing does not become dangerous . 可自動(dòng)防止故障危害的；有自動(dòng)保險(xiǎn)裝置的 a fail-safe device 故障保護(hù)裝置 返回 fail-safe