閉區間 Save Sign in to save words Simplified: 闭区间 bìqūjiān ㄅㄧˋ ㄑㄩ ㄐㄧㄢ closed interval (in calculus) Character by character 閉(bì)close 區(qū)area 間(jiān)between A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0