angle beam searching unit

例句：

1. 1. The angle of theroof is perfect for sunbathing.
   屋顶的角度非常适合晒太阳。
2. 2. The angle of the lightis what makes the painting so beautiful.
   光线的角度是这幅画如此美丽的原因。
3. 3. Theangle of the road is changing as weapproach the city center.
   随着我们接近市中心，道路的角度在变化。