轮流

The chairmanship rotates annually among members of the committee.

I take turns with my roommate at the same computer.

She and her sister alternate in doing the household chores.

They kept cross-examining him in relays.

The two teams took turns at standing guard.

system of job rotation

alternate in doing the housework

rule in turn

be the host by turns

take turns to be on duty; be on duty by turns

rolling power cut; rolling power outage

do the work by turns