You never know who or what might walk through the door.

VOA: standard.2010.07.06

You might say, this should have been obvious to someone, but it had never been written up well before.

有人可能会说,这谁都知道,但之前从未有人记录下这个概念

耶鲁公开课 - 金融市场课程节选

You might say, this should have been obvious to someone, but it had never been written up well before.

有人可能会说,这谁都知道,但之前从未有人记录下这个概念

耶鲁公开课 - 金融市场课程节选