1.

1. The price of vegetables and fruits fluctuates according to the season.
    蔬菜和水果的价格随季节而波动。

2.

2. His feelings fluctuated between excitement and fear.
    他的情绪在兴奋与恐惧之间变化不定。

3. fluctuate

3. The price of vegetables fluctuates according to the weather.
    蔬菜价随着天气变化而波动。

4. He fluctuated between hope and despair.
    他时而充满希望时而失望。

1. Prices fluctuate from year to year.
    物价年年波动。

1. 起伏：不同于淡马锡,Warren Buffett的Berkshire是一间上市的公司,它的股票价格可以基于投机、市场内的动物情绪和激动而有所起伏(fluctuate). 如果您还记得在1999年的股市由于dot.com这类公司而引致泡影(bubble),

2. 波动：他在 06 年球被击出去后转换成安打的机率整整比 05 年多了 70 点左右,而且这 6 年来渡边的 BABIP 波动 (fluctuate) 得很厉害,他的 ERA 也就随著 BABIP 的变化跳动得很厉害.

3. 稳定/波动：想都不要想2 主体段和结尾段的时态看题目里面的时间,如果是过去时间就用过去时,将来时间就用将来时3 如果原题没给时间,全篇文章都用一般现在时4 图表题里表示趋势的动词,比如上升,下降,稳定,波动(fluctuate)的所有动词一律全用主动,

4. (物价)波动：float n. 浮子,漂浮物;v. (使)漂浮 | fluctuate (物价)波动 | format n. 版式,格式

1. 变动;波动;上下浮动
    If something fluctuates, it changes a lot in an irregular way.

    e.g. Body temperature can fluctuate if you are ill.
           人患病后体温可能会上下波动。
    e.g. ...the fluctuating price of oil.
           油价的浮动

1. be unstable

    e.g. The stock market fluctuates

2. move or sway in a rising and falling or wavelike pattern

    e.g. the line on the monitor vacillated

    Synonym: vacillatewaver

3. cause to fluctuate or move in a wavelike pattern