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d region是什么意思

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d region 是什么意思

中文翻译与英英解释

【气象学】 D 区〔离地球表面约60到90公里高度处的电离层最低部分〕。
d:    短语和例子 CD = 400. DC = 600.
region:    n. 1.地方,地域,地带;地区;行政区,管辖区,区;左 ...

例句与用法

1.The space - time distribution of chinese semi - ari d region surface water is n ' t even , the differences in a year are obvious ; the differences of underground water between years are not so obvious as surface water , but it still has a decreasing tendency , especially in shanxi and sha ' anxi provinces . there is a significant linear correlation between the precipitation and water resources in semi - arid region , the dynamic regularity of water resources is basically same as the dynamic regularity of precipitation
半干旱地区地表水资?#35789;?#31354;分布不均匀,年内分配差别大,地下水资源年?#22987;?#21464;化?#20160;?#22823;,但总体有减少的趋势,尤以陕西和山西突出。半干旱地区降水量与水资源量线性相关显著,降水量的变化规律基本上与水资源量的变化规律吻合。

 
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