alternating

alternating

动词 alternate:

go back and forth; swing back and forth between two states or conditions

同义词：alternate, jump

exchange people temporarily to fulfill certain jobs and functions

同义词：alternate

be an understudy or alternate for a role

同义词：understudy, alternate

reverse (a direction, attitude, or course of action)

同义词：interchange, tack, switch, alternate, flip, flip-flop

do something in turns

同义词：alternate, take turns

形容词 alternating:

(of a current) reversing direction

occurring by turns; first one and then the other

同义词：alternate