v.波动,涨落,起伏( fluctuate的第三人称单数 );
例句:
The value of commodities often fluctuates.
商品的价值是经常变动的.
The level of the water table also fluctuates slightly with the season.
潜水面的高度也随着季节而稍有波动.
My weight fluctuates between 106 and 120 pounds.
我的体重在106与120磅之间变动.