除非这些条件得到满足，否则我们不能进行这项交易。

Until these conditions are met we cannot proceed with the sale.

《牛津词典》

除非计划奏效，否则该总统会面临一个难关。

The president could face a rough ride unless the plan works.

《柯林斯英汉双解大词典》

除非能对人们造成影响，否则这样的计划意义不大。

Such schemes mean little unless they impact people.

《柯林斯英汉双解大词典》

You can't take the exam unless you're registered for the class, and we need to make sure we can verify that.

否则你是不能参加这次考试的,除非你注册了这门课，而我们需要确定你能证实这一点。

麻省理工公开课 - 化学原理课程节选

There's just no way to explain that except to say that catalog of ships goes back to the Mycenaean Period.

除非《船舶名录》来源于迈锡尼文明时期,否则这点就无法解释了

耶鲁公开课 - 古希腊历史简介课程节选

That's $1 more than it costs now in the market, so the options are worthless unless the price of the stock goes up.

这样每股就要比市场价多花费一美元,除非股票价格增长了,否则这个期权就是没有价值的

耶鲁公开课 - 金融市场课程节选