起伏不定to fluctuate

• 物价波动

  price fluctuation

• 生活的波动

  life's ups and downs

• 人心波动

  fluctuation of public feeling

• 思想波动

  be indecisive

• 情绪波动

  be in an up and down mood

【理】wave motion

• 光的波动学说

  wave theory of light

【生理】fluctuation