The fogbow shape is created by those drops with the best angle to divert sunlight to the observer.

虹的形状是由滴以特定的角度反射阳光所。

Digital image captured in fog becomes blur and low contrast because of the scatter of the fogdrop.

天下获取的数字图像由于受滴散射影响，变模糊不清、对比度下降。