By using the 1988—2002 data of annual mean precipitation and evapotranspiration in the Heishui River basin of Minjiang River upper reach, and with the help of GIS, a comparison was made on the annual mean runoff coefficient of the watersheds with different landscape structure in the Heishui River basin.
在GIS技术支持下,结合岷江上游黑水河流域1988—2002年多年平均降水量和蒸散量空间分布,对不同景观结构的小流域多年平均径流系数进行比较。
Based on the average annual precipitation data fr.
本文以渤海海域及环渤海地区分水岭内为研究区域,利用环渤海地区分水岭内92个气象站点自1971年至2000年30年的降水量资料,基于ARC/INFO地理信息系统支持下的泰森多边形法,对研究区域内的平均年降水量进行了统计分析。
The insolation here is abundant, and the forest-free days are about209 days every year.
年平均降水811.2毫米，雨水集中于6、、三个月，无霜期209天。
The amount of snow this year have be below average
今年的降雪量低於平均水平
The amount of snow this year have is below average.
今年的降雪量低於平均水平。
The amount of snow this year has been below average.
今年的降雪量低于平均水平。
By 1945 global tariff barriers had declined to an average of 30%.
到1945年，全球关税壁垒已下降到平均为30%的水平。
The rainfall averages 36 inches a year.
年降雨量平均为36英寸.
Rainfall this year exceeded the yearly average.
今年的雨量超过了年平均降雨量。
The rainfall there averages 300 mm a year.
那儿的年降雨量平均每年为三百毫米。
The mountains rejoiced in an average annual rainfall of30 inches.
那山区的平均年降雨量为30英寸。
What is the average annual rainfall in this region?
这个地区的年平均降雨量是多少?
The average snowfall here is 10cm a year.
这里年平均降雪量为10厘米.
The rainfall average s800mm.a year.
平均每年降雨量为800毫米。
The mean yearly rainfall is20inches.
每年平均降雨量是二十英寸。
The rate of early marriage for women has come down and their average age at first marriage has gone up.
妇女早婚比例下降，平均初婚年龄提高。
The mountains rejoice in an average annual rainfall of thirty inches.
山区的年平均降雨量为30英寸。
The average rain falls 100 times out of 356 days in Beijing.
北京一年的平均降雨次数为100次。
In 1990, of the non-agricultural population in China's urban localities, the total fertility rate of women dropped to 1.26, or 1.05 lower than the nation's average figure.
1990年，全国城镇非农业人口的妇女总和生育率已降到1.26，比全国平均水平低1.05。
PERIODIC VARIATION AND LINEAR RISE TREND OF MONTHLY MEAN VALUE OF SEA-LEVEL IN PACIFIC OCEAN
太平洋月平均水位周期变化和线性升降趋势