He would have lost his position if you hadn't backed him up.假如你当初没有支持他，他可能已经失去职位了。They were supposed to be our allies but they didn't stand by us when war broke out.他们本应是我们的盟友，但是战争爆发的时候却没有支持我们。She felt betrayed by her mother's lack of support.她觉得母亲背弃了她，因为母亲没有支持她。