with time between 每隔…时间；间或；不时
Buses to the city leave at regular intervals.
开往城里的公共汽车每隔一定时间发出一班。
The runners started at 5-minute intervals.
赛跑的人每隔 5 分钟出发一批。
with time between 每隔…时间；间或；不时
Buses to the city leave at regular intervals.
开往城里的公共汽车每隔一定时间发出一班。
The runners started at 5-minute intervals.
赛跑的人每隔 5 分钟出发一批。