定律

牛顿运动定律

Niúdùn yùndòng dìnglǜ

Newton's laws of motion.

这是自然界的定律

zhè shì zìránjiè de dìnglǜ

This is a law of nature.

不要违背市场定律

búyào wéibèi shìchǎng dìnglǜ

Do not go against market laws.