天體力學 Save Sign in to save words Simplified: 天体力学 tiāntǐlìxué ㄊㄧㄢ ㄊㄧˇ ㄌㄧˋ ㄒㄩㄝˊ celestial mechanics Character by character 天(tiān)day 體(tǐ)body 力(lì)surname Li 學(xué)learn A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0