angle pencil of ray

例句：

1. 1. The car is pointed at the traffic light.
   汽车正对着交通灯。
2. 2. The plane's angle of descent is critical.
   飞机的下降角度至关重要。
3. 3. The angle of the roof is perfect for reading.
   屋顶的角度非常适合阅读。