noun
数据来源:WordNet
This device can determine the existence of shadowiness on bill-slopes during sunrise or sunset or noon-time so as to assure the sunshine duration on hill-slopes in different conditions .
这个方法通过对日出、日落和中午时坡面是否受遮蔽进行判别,从而确定了不同情况下的坡面的日照时间。