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发表于 2020-3-15 15:34:05
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zwyi 发表于 2020-3-15 10:32: V* Z% l8 {6 b& G' X( c8 _
CLOUD COVER, if heavy can blockmost UV radiation. Thin or brokenclouds allow most UV rays through. ... 4 w6 x% \ m/ F- U- L: c
CLOUD COVER, if heavy can blockmost UV radiation. Thin or brokenclouds allow most UV rays through. Puffy, fair weather clouds deflectrays and can increase UV radiationreaching the surface." p+ _, g3 K$ K3 Q
& ]+ s+ U+ U# ]( @% V厚云遮挡大部分紫外线;薄云则大部分紫外线都能穿透过去。而晴天里蓬松的云会折射紫外线,增加到达地面的辐射量。7 L/ P6 h; R4 N' k* j/ q" A* T* ^8 n
* n! ~, i$ X8 v X! N8 |谢谢,学习了!" p7 }2 y, Y2 [) l8 O
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