zài / jīngdiǎn / lìxué / zhōng / Niúdùn / dìnglǜ / tōngcháng / zài / guànxìngxì / zhōng / chénglì在经典力学中,牛顿定律通常在惯性系中成立。In classical mechanics, Newton's laws generally hold in an inertial frame.