shadowiness

1. 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。

noun

1. relative darkness caused by light rays being intercepted by an opaque body
   1. it is much cooler in the shade
   2. there's too much shadiness to take good photographs

   Synonym:    shadeshadiness