unless怎么读：英式读音为[ənˈles]，美式读音为[ənˈles]。unless可作连词和介词两种词性，基本含义为“除非”、“除非在…情况下”、“若非”、“如果不”、“除…之外”。

1、作为连词时，译为除非;除非在…情况下;若非;如果不。

例句：You won't get paid for time off unless you have a doctor's note.

除非你有医生证明，否则你不上班便拿不到工资。

I sleep with the window open unless it's really cold.

天气若不很冷，我总开着窗户睡觉。

I won't tell them ─ not unless you say I can.

我绝不告诉他们——除非你允许。

Unless I'm mistaken, she was back at work yesterday.

除非是我记错了，她是昨天回来上班的。

The theatre faces closure unless it gets an urgent cash injection.

剧院面临着倒闭，除非有大笔救急现金投入。

That's the plan ─ unless anything untoward happens.

计划就这么定了——除非出现异常情况。

He hasn't got any hobbies ─ unless you call watching TV a hobby.

他没有什么爱好——除非你把看电视也称作爱好。

Unless God were infinite, He would not be the End of desire.

神若非无限，他将不能成为期待的终结。

Most wild animals won't attack humans unless they are provoked.

大多数野兽若非被激怒，一般是不会袭击人的。

The possibility of this is low, unless by accident or intention, but it pays to check.

若非意外或故意，发生这种情况的可能性很小，但值得一查。

Shanghai Liangshi friendly remind: Save a tree. Don't print this news unless it's really necessary.

上海良时友情提醒：保护森林，节约纸张；若非必要，无需打印。

2、作为介词时，译为除…之外。

例句：Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high...

除非减肥是为了悦已，否则很难保持积极性。