unless extended by mutual agreement

例句：

1. 1.Unless you finish the work on time, we won't be able to meet the deadline.
   除非你按时完成工作，否则我们无法按时完成任务。
2. 2. Unless you have a valid passport, you cannot enter the country.
   除非你有有效的护照，否则你不能进入这个国家。
3. 3. Unless you are willing to take responsibility for your actions, you will not succeed in life.
   除非你愿意为自己的行动承担责任，否则你将不会在生活中取得成功。