水平面

例句：

1. 1. The car is parked on the level surface of the road.
   汽车停在道路的水平面上。
2. 2. The boat was moored to a level surface in the bay.
   船停泊在海湾中的水平面上。
3. 3. The engineer measured the level surface for the construction project.
   工程师测量了建筑项目的平水面。