unless
conj. 除非，除非在……情况下；若非，如果不
prep. 除……之外；除……之外
例句
Unless she loses some weight, she's had it.
除非她减掉一些体重，否则她就完蛋了。
《柯林斯英汉双解大词典》
That's the plan—unless anything untoward happens.
计划就这么定了—除非出现异常情况。
《牛津词典》
He resolutely refused to speak English unless forced to.
除非被逼迫，他坚决拒绝说英语。
