fault and flaw

The only flaw was your absence.

唯一的缺点就是你不在。

I just corrected its design flaws.

我刚刚修正了它的设计缺陷。

I think what the crisis showed is that the existing system had some major flaws.

我认为这场危机表明，现有的制度存在一些重大缺陷。