arm 的用法及固定搭配

arm

keep at arm's length是习语，有时照字面解，如The mother kept her baby at arm's length, thinking that he might try to kiss her。有时作“跟…冷淡、疏远”解，注意arm's前面没有an。at arm's length单独用（没有keep）也没有an，作“一臂之远”解，例如：He held the picture at arm's length to show it to me.