Linea arcuata

例句：

1. 1. The sun's rays cast an arc across the sky.
   太阳的光线在天空中投下一道弧线。
2. 2. The river flows in a sinuous arc around the city.
   河流蜿蜒流过城市。
3. 3. The car drove along an arc of the road.
   汽车沿着道路的弧形行驶。