She felt betrayed, as though her daughter had stabbed her in the back.
她感到被出卖了，仿佛是她的女儿在背后捅了她一刀。
《柯林斯英汉双解大词典》
2
I felt betrayed, stabbed in the back, and I was shocked, hurt and astounded.
我有一种被出卖，背后插刀的感觉，我很震惊，痛苦，惊愕。
3
But his defeat has stripped him of the aura of infallibility, enabling Mr Kan to keep him at close quarters with less fear of being stabbed in the back.