Those are the kinds of decisions they ' re left to make 那些受幅射的工作就是留给他们决定做不做的工作
Period during which solar radiation reaches sufficient intensity to cast distinct shadows 日照时间是指太阳幅射的强度足够投射清晰影子的时段。
Temperature read on a thermometer which is exposed to the air in a position sheltered from direct solar radiation . amount of cloud 从暴露于空气中但被遮挡不受直接太阳幅射的温度表上读出的温度。