in hindsight

In hindsight, we should have tested the system much more thoroughly before the launch.事后回想起来，我们在发布前应该对系统进行更彻底的测试。

In hindsight, the early warning signs were there—we just didn't pay enough attention to them.事后看来，早期的警告信号其实已经出现了——只是我们当时没有给予足够的重视。