月变化 meaning in English

monthly variation

Monthly change of positive mean current is similar to that of percentage of positive cg lightning , whereas the monthly change of negative lightning is relatively small
正地闪的月平均电流强度变化基本与正地闪所占比例的月变化相似，而负地闪强度变化相对较小。
The simulated results of net primary production ( npp ) are similar to other ' s study . the annual , seasonal and daily change of npp can reflect the physiological characteristic of vegetation growing very well and has close relationship with climatological factors
年npp的模拟结果与国内的一些其它类似研究结果接近， npp的模拟结果能较好地反映出植被生长的生理特点npp的月变化、日变化及年际变化对气候因子有不同的响应。