向下辐射 meaning in Chinese

downwelling rediation

Downward terrestrial radiantion
大气向下辐射
Atmospheric counter radiation
天气向下辐射
Of an interior lighting installation . the ratio of the direct flux on the working plane to the downward flux of the installation
在室内照明系统中，工作面上的直射光通与系统所有向下辐射的光通之比。
The dependence of the electron in 4i _ ( 13 / 2 ) level on the measured temperature and the radiative transition property of different stark sub - level were discussed
讨论了~ 4i _ ( 13 2 )能级电子布局随测量温度的变化以及不同stark劈裂态电子向下辐射跃迁的特性。