不定積分 Save Sign in to save words Simplified: 不定积分 bùdìngjīfēn ㄅㄨˋ ㄉㄧㄥˋ ㄐㄧ ㄈㄣ indefinite integral (math.) Character by character 不(bù)no 定(dìng)fix 積(jī)amass 分(fēn)divide A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0