In the middle to high latitudes rainfall has risen steadily over the last 20-30 years.(中高纬度地区的降雨量在过去的20到30年间稳步上升了。)
An annual rainfall of four inches is often used to define the limits of a desert.(年降雨量4英寸通常被用来界定沙漠的界限。)
A monsoon is a seasonal wind that can bring in a large amount of rainfall.(季风是一种季节性的风，它可以带来大量的降雨。)
As the earth's climate changes and rainfall becomes even less predictable in some places, those answers will grow even more valuable.(随着地球气候的变化和降雨在某些地方变得更加难以预测，这些答案将变得更加有价值。)
The rainfall in Wuhan reached a historical peak this year.(今年武汉的降雨量达到历史最高值。)
In these areas, rainfall per month exceeds that in the above definition, so other factors must contribute to savanna formation.(在这些地区，每个月的降雨量超过了上述定义中的量，所以一定有其他因素促成草原的形成。)
This spring, the town of Oso saw twice the usual rainfall.(今年春天，奥索镇的降雨量是往年的两倍。)
The impact of rainfall upon the surface water and groundwater resources of the desert is greatly influenced by landforms.(降雨对于沙漠地表水和地下水资源的影响很大程度上取决于地形。)
But during the past decade, the declining rainfall has allowed him to plant highly profitable crops.(过去的十年里降雨减少了，这让他有机会种植一些高利润的农作物。)
There has been below average rainfall this month.(这个月的降雨低于平均降雨量。)
