alternated

n.someone who takes the place of another person

同义词：surrogatereplacement

v.

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

同义词：jump

exchange people temporarily to fulfill certain jobs and functions

be an understudy or alternate for a role

同义词：understudy

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

同义词：interchangetackswitchflipflip-flop

do something in turns

同义词：take turns

1. She alternated between working and resting throughout the day.
   她整天交替工作和休息。
2. The lights alternated between red and green during the test.
   在测试过程中，灯光在红色和绿色之间交替变化。
3.