The operation of natural law is constant. 自然法则的作用是永恒的。
He posited three basic laws of nature. 他假设了三条基本的自然法则。
Conservation laws, being based on the most elementary and intutive ideas, are the most profound statements of natural law. 守恒定律都是基于最基本的和直觉的概念，所以都是自然定律的最深刻的陈述。
