月平均降水量(Average Monthly Rainfall)(插图)
City B has six months in a year with an average rainfall of more than 50mm; on the other hand, City A has an average of above 30mm for its three rainy months.
City A usually has three months without rain, while City B has no dry months.
Both cities have approximately the same amount of rainfall in January; in March, however, the amount of rainfall differs greatly.
City B's rainfall tends to remain fairly constant throughout the year, whereas City A's rainfall all eomes in five months (from November to March).
本文地址：