secretly privately on the sly behind sb.´s back
Both men continually bad-mouthed each other.
两个人都在背地里频繁地互相攻击。
—— 柯林斯例句I can´t help feeling he´s playing some deep game of his own.
我不由得感觉他在背地里搞鬼。
—— 给力词典精选She slandered him behind his back.
她在背地里对他造谣中伤。
—— 给力词典精选You eat her food, enjoy her hospitality and then criticize her behind her back.
你吃着她的食物,享受着她的款待,然后还在背地里指责她。
—— 柯林斯例句But behind the scenes Mr Cain will be working quietly to try to get a deal done.
但是,凯恩先生将背地里偷偷行动以争取达成交易。
—— 柯林斯例句