vertical internal test signal

例句：

1. 1.The building is vertically aligned with the street.
   这座建筑与街道呈垂直排列。
2. 2.The car was parked vertically on the ramp.
   汽车停在斜坡上，呈垂直停放。
3. 3. The tree is vertical to the ground.
   这棵树与地面垂直。