With hindsight, we'd all do things differently.

事后想来，我们可能都会以不同的方式做事。

With hindsight it can be seen as an important first stage in the controlled evolution of democracy.

事后看来，可以把它视为民主控制的演变中重要的第一阶段。

In hindsight, the benefits of Internet advertising were grossly exaggerated.

事后想来，互联网广告的益处被严重夸大了。