Average Monthly Rainfall
根据下表，写一篇120词的短文。
Average Monthly Rainfall( in millimetres )
Average Monthly Rainfall
As it is shown in the table, rain falls every month in City B, whereas in City A some months register zero rainfall.
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).
月平均降水量
如表所示，乙城每月下雨，而甲城在几个月中滴雨未下。
乙城一年中有六个月平均降雨超过50毫米，而甲城三个月的雨季中平均降雨在30毫米以上。
甲城通常是三个月不下雨，而乙城没有不下雨的月份。
在1月份两城降雨量几乎相同，但在3月份降雨量就截然不同了。
乙城的降雨量终年不断，而甲城的降雨集中在五个月里(从11月到3月)。
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