interval
noun [ C ] uk/ˈɪn.tə.vəl/ us/ˈɪn.t̬ɚ.vəl/
(TIME/DISTANCE)
C2 间隔;间距
a period between two events or times
We see each other at regular intervals - usually about once a month. 我们定期见面——通常大约是每月一次。
C2 （两点之间的）区间
the space between two points
The plants should be spaced at six-inch intervals. 这些植物应该以六英尺的间隔栽种。
B1 UK (US intermission)（演出的）幕间休息;（体育比赛的）中间休息，中场休息
a short period between the parts of a performance or a sports event
There will be two 20-minute intervals during the opera. 歌剧演出中有两次20分钟的幕间休息。
He scored his first goal of the match three minutes after the interval. 下半场刚开始3分钟，他就射入了他本场比赛的第一个进球。
at intervals 每隔（一定时间或距离）
repeated after a particular period of time or a particular distance
In the event of fire, the alarm will sound at 15-second intervals/at intervals of 15 seconds. 发生火灾时，警报每隔15秒就会响一次。
Old family photos are featured at intervals throughout the book.
The lights flash at intervals of exactly 5.3 seconds.
Markers were placed at intervals along the route.
Gas firms have produced plans to drill at intervals of 10 acres.
(MUSIC)
music specialized音程
the amount by which one note is higher or lower than another
an interval of a fifth (= between one note and another one four notes higher) 五度音程