Know the UV index: when the UV index predicts radiation levels of 3 (moderate) or above sun safety practices should be taken.
了解紫外线指数：当紫外线指数预报辐射级别为3(中度)或更高时。
2
Then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes.
接着推导了阶跃折射率平面介质波导和圆光纤的正交模式——包括束缚模式和辐射模式。
3
The results indicate that the functional combination of net radiation and radiative dryness index may not only determine NPP, but also elucidate basically the ordinal range of vegetation types.