rainfall汉语翻译：
n. 降雨, 降雨量
【经】 降雨量英语解释：
名词 rainfall:

water falling in drops from vapor condensed in the atmosphere同义词：rain

例句：

Excessive rainfall had made the harvest impossible.雨量过多，丰收已经不可能了。

The mean yearly rainfall is20 inches.每年平均降雨量是二十英寸。

The lateral or downward movement of dissolved or suspended material within soil when rainfall exceeds evaporation.淋溶作用当降雨量超过蒸发量时，土壤中溶解或悬浮物的向侧面或向下的运动

The rainfall averages 36 inches a year.年降雨量平均为36英寸。

This area has very low rainfall.这个地区雨量稀少。

详细解释：
rain.fall
n.（名词）
A shower or fall of rain.
阵雨，降雨
The quantity of water, expressed in inches, precipitated as rain, snow, hail, or sleet in a specified area and time interval.
降雨量：雨的数量以英寸表示，为某一地区在特定时间段内雨、雪、冰雹或霰的积累量

rainfall