It will be months before we get the results.
我们要等很长时间才能得到结果。
It was many years before the full story was made public.
许多年之后,事情的全貌才公之于众。
We will study the report carefully before making a decision.
我们将认真研究这份报告,然后再作决定。
I'd like a second opinion before I make a decision.
我在作决定之前,想听听别人的意见。
I didn't have time to change clothes before the party.
我没时间在聚会前更换衣服。