All year she has fluctuated between optimism and despair.全年当中她时而乐观,时而消沉.Her family had of late exceedingly fluctuated.她家里最近连起风波.His feelings fluctuated between excitement and fear.他的心情变化不定,有时激动,有时害怕....

fluctuated的音标：...

v.波动，涨落，起伏( fluctuate的过去式和过去分词 )...