horizontal ridge for gable and hip roof

例句：

1. 1.The house is built along the horizontal line of the street.
   这所房子沿着街道的水平线建造。
2. 2. The car's wheels are horizontal, which makes it easy to steer.
   汽车的轮子是水平的，这使得转向很容易。
3. 3. The river flows horizontally across the plain.
   这条河横穿平原。