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.
我思故我在已被废弃；我们应说，我感受故我在。
Success in any scientific career requires an unusual equipment of capacity, industry, and energy.
出自汉·桓宽《盐铁论·刺赋》。释义：冰和炭不能放在同一个容器之中，太阳和月亮也不会同时照耀大地。比喻君子与小人不能同处，或比喻相互矛盾的理论不能同时运用。
We must balance energy supply with environmental protection.