- 闭区间 bìqūjiān closed interval
- 开区间 kāiqūjiān open intervalopen interval (in calculus)
- 信赖区间 xìnlàiqūjiān confidence interval(statistics) confidence interval
- 时间区间 shíjiānqūjiān time interval
- 置信区间 zhìxìnqūjiān confidence interval(statistics) confidence interval
- 区间车 qūjiānchē shuttletrain or bus traveling only part of its normal route
