to experience very high and very low emotional states in a short time
在短时间内经历非常高和非常低的情绪状态 (zai duan shijian nei jingli feichang gao he feichang di de qingxu zhuangtai)
"The week was a rollercoaster of emotions, with moments of joy and sadness."
"这一周是一个情绪过山车，充满了快乐和悲伤的时刻。" (zhe yi zhou shi yi ge qingxu guoshanche, chongman le kuaile he beishang de shike)
to perform or express emotions through actions
to come together around someone or something
to suddenly start talking about something unrelated
smiling broadly due to happiness
to start something from the very beginning
a strong and harmful need to do or use something
