fluctuation
词根词缀：
fluctuant adj. 变动的，波动的
fluctu 波浪 + ant …的 → 变动的，波动的
fluctuate v. 波动
fluctu 波浪 + ate 做，造成，使… → 波动
fluctuation n. 波动，起伏
fluctu 波浪 + ation 状态 → 波动，起伏
数据来源：新东方英语词汇速记大全
相关例句：
We discover they have a relationship between the exchange rate fluctuation and the fluctuating price of real estate.
通过二者的共性和特性的分析，发现汇率波动与房地产价格波动是有一定关联性的。
This paper studies the influence factors of the short-term fluctuation of cotton price in China by ARCH model.
采用ARCH模型对我国国内短期棉花价格波动的影响因素进行了研究。
The amplitude of wall temperature fluctuation is larger than that of fluid temperature oscillation.
流量的波动又引起了管壁温度和流体温度的周期性波动；
According to the characteristics of the human pulse signals, a pulse fluctuation frequency measurement system is designed.
根据人体脉搏信号特征，本文设计了一种脉搏波动频率测量系统。
Moreover, the influence of the geometric parameters on efficiency and speed fluctuation of the roller drives is discussed.
并且论文也讨论了滚筒的几何参数对效率和速度变化的影响。
Once we have a function, it is much easier to filter on different data sets and fluctuation thresholds.
一旦我们拥有了一个函数，对不同的数据集和波动临界点进行过滤就简单多了。