他的情绪似乎在兴奋和焦虑之间交替。
His mood seems to ___alternate between excitement and anxiety.
她的情绪似乎在快乐和忧郁之间交替。
Her mood seems to ___alternate between cheerfulness and melancholy.
在这个地区，天气往往在晴天和大雨之间交替。
In this region, the weather tends to ___alternate between sunny days and heavy rain.
浙公网安备33010902004675号
