把这一句，留给此刻的你

I learned quickly, as I tell my graduate students now, there are no answers in the back of the book when the equipment doesn't work or the measurements look strange.

我学得很快，就像我现在告诉我的研究生的那样，当设备不工作或者测量结果看起来很奇怪时，书的后面没有答案。

— Martin Lewis Perl 马丁·刘易斯·佩尔