- 守恒定律 shǒuhéngdìnglǜ conservation lawA principle in physics stating that a certain property of an isolated system remains constant over time.
- 平方反比定律 píngfāngfǎnbǐdìnglǜ inverse-square lawinverse-square law (physics)
- 摩尔定律 Mó'ěrdìnglǜ Moore's law
- 浮力定律 fúlìdìnglǜ Archimedes' principleArchimedes' principle (the physical law of buoyancy)
- 运动定律 yùndòngdìnglǜ laws of motionlaws of motion (mechanics)
