短語詞組短語error on the safe side 安全誤差be on the safe side 萬無一失;凡事小心為妙;凡事警惕為妙;不冒險(xiǎn)err on the safe side 寧可失之謹(jǐn)慎on the safe side detail 穩(wěn)妥可靠 返回 on the safe side