The value of any mental activity is measured by its contribution to successful living.
任何心理活动的价值都以其对成功生活的贡献来衡量。
我们都是自己生活的囚徒，但有些人比其他人更自由。
We are all just echoes of something that once was.
国家一定要有直言进谏的臣子，上级必须有敢于提出反对意见的下级，议论国政的人不停止，各种不同政见的人相互辩论，才可以长久保存国家，使国家兴盛强大。也就是说言论自由是民众的基本权利，每个人都可以提出不同的政见，民众有平等参与政治的权利。
The world needs more scientists who think like engineers, and more engineers who think like scientists.
Failure in the lab is not the end - it's just another data point.
Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.