The doctor advised me to bathe in the sun rays. 大夫要我多晒太阳。
This afternoon I'll go to the beach and try to catch some rays. 今天下午我们将到海滩去晒晒太阳。
The best source?Exposure to UB rays found in natural and artificial sunlight. 暴露于天然和人工日光中,紫外线最佳强度是多少?
If the sky appears blue to us on earth,it is because the earth's atmosphere scatters a certain number of blue rays of sunlight. 如果说我们从地面上来看天空是蔚蓝的,那是因为地球上的大气散射了日光中一定量的蓝色光的缘故。