Planting vegetation on rooftops also reduces surface temperatures.
又如在房顶上种植蔬菜也可以降低地表温度。
And base on the experiment, calculating formula of cross section mean velocity's reduction after planting and bed shears stress of vegetation dam block are established.
同时在试验的基础上,推导得植树后断面平均流速减小值和植物坝段床面剪应力的计算公式。
Planting and making forests is to raise the earth's vegetation plant cover rate.
我国东南山区植被覆盖率高,进行土壤遥感调查困难重重。
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