We just launch the site three weeks ago.

我们三周前才开放了网站。

麻省理工公开课 - 媒体、教育、市场课程节选

That's something we've mentioned already three weeks ago, two weeks ago, we're going to take that fix now, we're going to assume you know who these candidates are.

我们在三周或两周前已经提到过,现在来讲一下这种情况,我们假设你们知道这些候选人是谁

耶鲁公开课 - 博弈论课程节选