已经有4年降雨量低于平均水平了。
年降雨量4英寸通常被用来界定沙漠的界限。
An annual rainfall of four inches is often used to define the limits of a desert.
热带草原的年降雨量在1000毫米到2000毫米之间。
Savannas experience an annual rainfall of between 1,000 and 2,000 millimeters.
每年至少有2032毫米（80英寸）的降雨量才算是正常；有些地区的年降雨量可能高达10922毫米（430英寸）。
At least 80 inches of rain a year is normal and in some areas there may be as much as 430 inches of rain annually.
平均年降雨量：14.77英寸。
平均年降雨量：48.35英寸。
平均年降雨量：50.2英寸。
平均年降雨量：20.4英寸。
平均年降雨量：30.24英寸。
农作物的收成与年降雨量有密切关系。
平均年降雨量：8.3英寸。
平均年降雨量：12.17英寸。
年降雨量与孤独症患病率有关。
平均年降雨量：4.5英寸。
这里的年降雨量平均为700毫米。
这个地区一年降雨量少于250毫米。
那儿的年降雨量平均每年为三百毫米。
这个地区的年降雨量很少。
这个地区降雨量只是正常的年降雨量的一半。
The region received just half its normal annual fall of rain.
年降雨量几乎为零的南极洲，实际上算得上沙漠了。
With annual rainfall close to zero, Antarctica is technically a desert.
四川省年降雨量达到了1000毫米，平均温度是摄氏16.5度。
The annual rainfall in this province is 1000 millimeters and the average annual temperature is 16.5c.
雨水可能是具有充足和可靠的年降雨量的地区最主要的水源了。
Rainwater may be the major source of water in areas with adequate and reliable year-round rainfall.
统计数据可能带有误导性，在那些年降雨量充沛并且平稳的地方，管道用水需求将比较低。
The statistics can be misleading: in places where rain falls copiously and evenly from the skies, withdrawals will be small.
对于年降雨量一直高居首位的东南部各州，很多郡和市都出台了限制用水及严禁生火的措施。
And in the south-eastern states, accustomed to having some of America's highest annual rainfalls, many counties and cities have had to establish water restrictions and bans on fires.
盛行风在西南方向，这里常年高温，年降雨量的比例较低，经常造成干旱的条件。
The prevailing wind is in South-West direction, the temperatures are very moderate reaching high levels of heat frequently around the year with low percentage of rainfall, creating arid conditions.
这是热带和亚热带植物，需要高温，高湿，和年降雨量1500毫米以上的环境。
It is a tropical or subtropical plant, needing high temperatures, high humidity and up to 1500 mm of annual rain.
比如说金融网络中的资金交易量，股票市场的收益率，核反应堆的温度分布，年降雨量等。
Such as the bankroll trading volume in the finance network, the return rate of stock market, temperature distribution in unclear reactors and the volume of annual rainfall, etc.
年降雨量较大年份对应的植被覆盖度较高，反之较差，年平均气温对植被状况影响不明显。
Annual rainfall of the year corresponding to the larger vegetation in good condition, otherwise poor.
这个区域的平均年降雨量为149至216毫米（小于1英寸），湖泊所在的盆地多数时候干涸为盐田。
This area receives 149 to 216 millimeters of rainfall a year on average, and the basins pass most of their time as saltpans.
这个区域的平均年降雨量为149至216毫米（小于1英寸），湖泊所在的盆地多数时候干涸为盐田。
This area receives 149 to 216 millimeters of rainfall a year on average, and the basins pass most of their time as saltpans.
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