肯定否定定律
affirmative and negative law
Fick第二扩散定律
Fick’s second diffusion law
Newton第二定律
Newton’s second law of motion
birth control work
Newton第三定律
birth culture
Newton’s third law of motion
Newton第一定律
birth axis
Newton’s first law of motion
地理学第一定律
the First Law of Geography
geographic first law