4周搞定2000+托福核心词
fluctuation = fluctu(波浪) + ation(表结果) = 波浪→起伏，波动
accumulation = ac(一再) + cumul(堆积) + ate(使) + ion(表名词) = 一再使堆积起来→积累
advocate = ad(强化) + voc(叫喊) + ate(使) = 增强声音→拥护
使像波浪一样→使波动
fluctuate
常考释义
Essential goods from outside the district had become more readily available at the market, and prices did not fluctuate as much as they had done before.
外来的生活必需品在市场随处可见，并且商品的价格也不再像以前那样有很大的波动。
来源于：剑雅7-Test2vi. 波动；变动
vt. 使波动；使动摇
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