定义 中文名称： 天空辐射 英文名称： sky radiation 其他名称： 天空散射辐射,天空漫射辐射(diffuse sky radiation,漫射太阳辐射(diffuse solar radiation 定义： 来
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他们发现，辐射从天空各个方向(他们可以测定)射来，具有相同的能量！
What they found was that radiation was coming from everywhere in the sky (that they could measure) with the same exact energy!
云量：在晴朗无云的天空，紫外线辐射水平最高。但是，即使有云层，紫外线辐射水平也可以很高。
Cloud cover: UV radiation levels are highest under cloudless skies but even with cloud cover, they can be high.
WMAP于2001年被送入太空，用来测量宇宙微波背景(CMB，即充满整个天空的大爆炸残留热量)辐射的差异。
Launched in 2001, WMAP measures differences in the Cosmic Microwave Background (CMB) radiation, the residual heat of the Big Bang that fills the Universe and appears over the whole of the sky.
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