unless and until the problem is solved 除非并直到问题解决
unless and until you act 除非并直到你行动
unless and until it rains 除非并直到下雨
unless and until we meet 除非并直到我们见面
unless and until the danger passes 除非并直到危险过去
1. I will not forgive you unless and until you apologize sincerely.
我除非并直到你真诚道歉，否则不会原谅你。
2. The project is on hold unless and until the budget is approved.
除非并直到预算获批，否则项目处于暂停状态。
3. We cannot trust him unless and until he proves his loyalty.
除非并直到他证明他的忠诚，否则我们不能信任他。
4. This rule remains in effect unless and until the new law is passed.
除非并直到新法律通过，否则该规则继续有效。
5. She won't stop worrying unless and until she hears the good news.
除非并直到她听到好消息，否则她不会停止担心。
A: Can I leave the house now?
A：我现在可以出家门吗？
B: No, you cannot leave unless and until you finish your homework.
B：不，除非并直到你完成作业，否则你不能离开。
A: Okay, I will finish it right away.
A：好的，我马上完成。
1) 强调在条件满足前某事不会发生
2) 强调在时间点到达前某事不会发生
3) 常用于法律、正式或严肃语境中
4) 比单独的until语气更强烈
5) 常用于表达坚定的立场或严格的限制
1. 除非……否则不……；直到……才……
e.g.
Nothing will change unless and until you take action.
除非并直到你采取行动，否则什么都不会改变。
conjunction phrase
1. used to emphasize that something will not happen until a specific condition is met or a specific time is reached.
Synonym: until, unless