We must remember that we are not the only species that matters on this planet.

A law of nature， lex naturalis， is a precept or general rule found out by reason， by which a man is forbidden to do that which is destructive of his life or takes away the means of preserving the same.

我们必须投资研究，使水产养殖更高效，对海洋生态系统的影响更小。

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.

理性预期假说并不意味着人们能完美预测未来；它意味着人们不会犯系统性错误。