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.

永远的经典,无法翻译的英语经典。伦敦上空的鹰们万岁。

能源领域的每一个挑战都是做得更好的机会。

The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.

追求幸福是一段永无止境的旅程。