The only perfect science is hind-sight.
仅有的完美的科学就是马后炮。
In hind sight it's easy to see where we screwed up and where we possibly could have made things better.
事后，我们会很容易明白，我们搞砸了，我们可能在这方面做的更好。
In hind sight it's easy to see where we screwed up and where we possibly could have made things better.
事后，我们会很容易明白，我们搞砸了，我们可能在这方面做的更好。
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