arc air gouging

例句：

1. 1. The arc of the sky is breathtakingly beautiful.
   天空的弧线令人叹为观止。
2. 2. The car drove along the arc of the road.
   汽车沿着道路的弧形行驶。
3. 3. The arc of the moon casts a shadow on the ground.
   月亮的弧形在地面上投下了影子。