1. 自然[界定]律：瞬间动量定律 law of moment of momentum | 自然[界定]律 law of nature | 宇称定律 law of parity

2. 自然法则, 自然定律：law of diminishing returns 报酬递减法则 | law of nature 自然法则, 自然定律 | lay down the law to 发号施令

noun

1. a generalization that describes recurring facts or events in nature

e.g. the laws of thermodynamics

Synonym: law