n.间隔；休息时间；(数学)区间；(音乐)音程
He comes back to see us at regular intervals. 他每隔一段时间就回来看看我们。
The performance runs 2 hours 30 minutes including an interval. 整个演出2小时30分,包括中间休息。
These equations are interval linear equations. 该控制方程是线性区间方程组。
This paper considers the nonlinear programming problem of interval parameters. 摘要讨论了区间参数非线性规划问题。
n.丘陵间低地
