Here are some of the top lessons we learned :

以下是我们学到的一些最重大的教训。

That , to me , is one of the lessons of chemistry .

这就是我从化学学到的教训之一。

But google has already learned some hard lessons .

但谷歌在这方面已经有过一些惨痛的教训。

This might suggest americans have learned their lessons .

一切似乎意味着人们已经汲取了教训。

Sony ( sne ) has taken those lessons to heart .

索尼把这些教训谨记于心。