Check the oil at regular intervals, and have the car serviced regularly.

定期检查机油，经常保养汽车。

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。

George struggled wildly, going under and resurfacing at regular intervals.

乔治疯狂地挣扎着，不断在水面上浮浮沉沉。

In ancient time, courier station would be established at regular intervals.

古代的时候，人们每隔一定的距离就会设定驿站。

The doctor visits his patients at their homes at regular intervals.

那医生定期到病人家出诊。