There has been below average rainfall this month.
这个月的降雨低于平均降雨量。
There have been four years of below average rainfall.
已经有4年降雨量低于平均水平了。
Record levels of rainfall fell over the southeast of the country.
该国东南部降下了最高纪录的雨量。
Victoria Falls has had above average levels of rainfall this year.
维多利亚瀑布今年的降雨量高于平均水平。
Rainfall from a tropical storm dislodged the debris from the slopes of the volcano.
一场热带风暴带来的降雨把岩屑从火山坡上冲走了。
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。
Rainfall is also increased in cities.
城市的降雨量也在增加。
Rainfall can revive them in a matter of hours.
降雨可以在几小时内使它们恢复生机。
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 rainfall in Wuhan reached a historical peak this year.
今年武汉的降雨量达到历史最高值。
Kona and Hilo have approximately the same rainfall in a given year.
科纳和希洛在同一年的降雨量大致相同。
The wildebeests follow, in their migration, the pattern of local rainfall.
角马在迁徙时遵循当地降雨的模式。
The chemical composition of rainfall changes slightly as rain clouds move.
降雨的化学成分随着雨云的移动而发生轻微变化。
The chemical composition of rainfall changes slightly as raid clouds move.
当雨云移动时，降雨的化学成分略有变化。
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。
Rainfall is not completely absent in desert areas, but it is highly variable.
沙漠地区并非完全没有降雨，但它的变化很大。
Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters.
热带草原的年降雨量在1000毫米到2000毫米之间。
In fact, Seattle ranks 44th among major U.S. cities in average annual rainfall.
事实上，西雅图的年平均降雨量在美国主要城市中排名第44位。
It's believed that rainfall will stay at the same level if the temperature rises.
人们认为如果气温上升，降雨量将保持在同一水平。
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。
Farmers in South Africa are more at the mercy of nature, especially inconsistent rainfall.
南非的农民更容易受到大自然的影响，尤其是变化无常的降雨。
But during the past decade declining rainfall has allowed him to plant highly profitable crops.
过去十年，降雨量不断减少，这让他可以种植高利润型农作物。
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。
Rainfall was limited, and what water there was rushed across the plain in the annual flood of melted snow.
降雨量有限，每年融化的雪水洪流冲过平原，成为滋润此地的水源。
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