年平均降水量 mean annual precipitation ; Praeciptatio media annua
多年平均降水量 annual mean precipitation
面平均降水量 Areal mean Rainfall
日平均降水量 average daily precipitation
流域平均降水量 mean basin precipitation
多年平均年降水量 mean years annual precipitation
平均日降水量 mean daily precipitation
平均年降水量 average annual precipitation
The mean annual precipitation in Northeast China is 489mm, successively decreasing from southeast area to northwest area, which is 635mm, 481mm, and 355mm, respectively, in the east, central, and west regions.
东北区多年平均降水量为489mm，从东南向西北递减，多年平均东部区、中部区和西部区的降水分别为635mm，481mm，355mm。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
全年平均降水量659毫米，增加8.0%。
The annual average precipitation was 659 millimeters, up by 8.0 percent.
北京中心城区和南部城区的雷暴是最大的，平均降水量为9毫米。
The thunderstorm was heaviest in Beijing's central and southern districts, which saw an average of 9 millimeters of rain.
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.
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