So, instead of having the periodicvariation of water, or the periodicvariation of air density here we're talking about an electric field.
不像水或者空气密度的，周期变化，我们这里，讨论的是电场。
2
This paper analyses the area distribution and periodicvariation of intensity of the urban heat island in southeastern coastal cities of Fujian Province.
本文分析了闽东南沿海城市的热岛强度的平面分布和周期性变化。
3
From experiments and analysis show that the daily periodicvariation of temperature is one of the main reasons causing the daily periodicvariation of phreatic water ta...