开区间 Save Sign in to save words Traditional (Taiwan): 開區間 kāiqūjiān ㄎㄞ ㄑㄩ ㄐㄧㄢ open interval (in calculus) Character by character 开(kāi)open 区(qū)area 间(jiān)between A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0