angle incidence indicator

例句：

1. 1. The car is pointed straight at the traffic light.
   汽车直指交通灯。
2. 2. The angle of the roof is perfect for sunbathing.
   屋顶的角度非常适合晒太阳。
3. 3. The angle of the bookcase is too steep to climb up.
   书柜的角度太高，爬不上去。