年变程 meaning in English

annual march

Compared with annual variation averaged over china , rainfall in region 1 is more in winter and spring but less in july and autumn ; region ii a and ii b have more rainfall in september and october ; rainfall in region iii is less from november to march of the next year while more in july and autumn ; region iv has less rainfall in may and june ; precipitation in region vis significantly more from middle - dekad in june to first - dekad in july , which manifests the feature of meiyu in middle - lower reaches of the yangtze river ; region via and vib have more rainfall in november . the characteristic periods of time are defined which indicate the typical characteristics of rainfall in each region
与全国平均年变程相比，区域冬、春季降水偏多， 7 - 8月份降水相对偏少；区域a和b在9 、 10月份降水显著偏多；区域11月至次年3月降水明显偏少， 7 、 8月份降水相对偏多；区域5 - 6月份降水偏少；区域6月中旬到7月上旬降水显著偏多，体现了长江中下游的梅雨特征；区域a和b在11月份的降水相对偏多。