无倾线

例句：

1. 1.The car is leaning tothe left because of the heavyrain.
   由于大雨，汽车向左倾斜。
2. 2.The angle of the roof is crucial forthe stability of the building.
   屋顶的角度对建筑的稳定性至关重要。
3. 3. The engineer measured the angleof the slope to ensure safety.
   工程师测量了斜坡的角度以确保安全。