单词用法
CONJ You use unless to introduce the only circumstances in which an event you are mentioning will not take place or in which a statement you are making is not true. 除非; 如果不
短语搭配
not unless 除非
unless lease （油）除非租约
Unless Otherwise 除非；除非另有；除非另；除非另……
unless and until 直到…才
双语例句
I won't tell them—not unless you say I can.
我绝不告诉他们—除非你允许。
That's the plan—unless anything untoward happens.
计划就这么定了—除非出现异常情况。
Training is worthless unless there is proof that it works.
训练并无价值，除非证明其有效。
