angle lap-stain method

例句：

1. 1. The car is pointing straight at the traffic lights.
   汽车正对着交通灯直行。
2. 2. She pointed to the door with her finger.
   她用手指指向门。
3. 3. The angle of the roof affects the room's lighting.
   屋顶的角度影响房间的照明。