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d region中文什么意思

发音:   用"d region"造句
  • 【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:     CD = 400. DC ...
  • region:    n. 1.地方,地域,地带;地区;行 ...
  • d-region:    d电离层; d区
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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源时空分布不均匀,年内分配差别大,地下水资源年际间变化率不大,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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