aphylactic map projection

例句：

1. 1.The map projection is a useful tool for planning routes.
   地图投影是一种规划路线的有用工具。
2. 2. The projector's beam was directed towards the wall.
   投影仪的光束被指向墙壁。
3. 3. The map projection revealed a hidden valley in the mountains.
   地图投影揭示了山中的一处隐蔽山谷。