Read Edit View history 开区间 kāiqūjiān open interval Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 开区间/開區間 · kāiqūjiān · open interval 2026/03/04 开区间 / 開區間 kāiqūjiān open interval open interval (in calculus) 函数在开区间 (a, b) 内是连续的。 created sense Mar 4, 2026, 02:25 AM