alternated [ˈɔːltə(r)neɪtid]

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附加级

v.交替( alternate的过去式和过去分词 )；（使）交替，（使）轮换

He alternated between hope and despair. 他时而充满希望，时而绝望。来自《简明英汉词典》
The young man alternated singing and dancing. 那年轻人一会儿唱，一会儿跳。来自《简明英汉词典》