在博茨瓦纳，三角洲的平均年降水量有450毫米。
In Botswana we have maybe an average of 450 millimeters a year (of) rain on the Delta itself.
将1956 ~ 2000年平均降水量作为多年平均年降水量，全区多年平均年降水量为666.1毫米。
According to 45 years (1956-2000) date of precipitation in the area, the annual mean precipitation is 666.1mm.
而从2002年到2008年，这一干旱地区的平均降水量只有50厘米每年。
And the arid region's rainfall levels were above the average of 50 centimeters per year from 2002 to 2008.
IRI也没有预测阿玛逊河流域会出现低于平均降水量，而该地区去年夏天遭受了百年不遇的严重旱情。
IRI did highlight the Amazon as a region likely to have below-average summer rains, though, and the Amazon ended up having a 100-year drought last summer.
7月21日，北京大雨到暴雨天气，平均降水量为170mm，自1951年以来有完整气象记录的最大降水量。
In July 21st, Beijing heavy rain to heavy rain weather, the average rainfall of 170mm, since 1951has complete meteorological record the maximum precipitation.
对黄河河源区多年平均和雨季降水量、年际径流量进行分析。
The annual average and rain season precipitation and yearly runoff of the source regions of the Yellow River were analyzed.
结果表明，山东省年、季平均气温呈波动性增暖趋势，降水量呈减少趋势。
The result shows that the annual and quarterly average temperature of Shandong Province has a tendency to increase the production of winter wheat, the precipitation has a tendency to reduce.
指出本年度年平均气温偏高、年降水量正常略偏少，年日照时数偏少，气象灾害多，发生频繁，气候条件对农业生产有利有弊。
The temperature is a lightly higher, the precipitation is a slightly less, the sunshine time is less and calamities are frequent, which possess advantages and disadvantages to agricultural production.
通过对1961 年以来青南高原气候变化的分析，发现该地区年平均降水量及秋季降水量无明显的变化趋势，且其年际间的波动趋于缓和；
The climatic variations since 1961 on Qinghai south plateau were analyzed in this paper. It indicated that the annual and autumn precipitation did not have significant tendency of variation.
年降水量和年平均温度的波动特点是决定累加作用时间和影响强度的关键。
The variation of air mean temperature and annual precipitation played a key role in the duration and intensity of cumulative impacts on desertification.
对流域历年平均降水量序列最大熵谱分析表明存在3.6年的显著周期和5.7年的次周期。
Spectrum Analysis and Maximum Entropy Spectrum Analysis of precipitation show 3.6, 5.7 years period and the evaporation has no significant period.
四川、重庆平均降水量为345.9毫米，是1951年以来历史同期最小值。
The average rainfall volume on Sichuan and Chongqing rated 345.9 mm, the lowest level in history records since 1951.
利用均生函数外延，作出各代表点未来30年的年平均气温及年降水量预报。
Based on the mean value function, forecast was made of each year's mean air temperature and mean precipitation in the coming 30 years.
利用均生函数外延，作出各代表点未来30年的年平均气温及年降水量预报。
Based on the mean value function, forecast was made of each year's mean air temperature and mean precipitation in the coming 30 years.
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