1. Are the lines perpendicular to each other? 这些直线相互垂直吗?
2. The sides of the mountain are almost perpendicular. 山的两侧几乎是垂直的。
3. What she's going to do is to start loading up the electrons, and you see this wand here move slowly, and start become perpendicular. 她要做的是开始加载电子,你可以看到这个棒子移动得很慢,并开始变得垂直了。
4. The wall is a little out of the perpendicular. 墙壁有点倾斜。
5. The left wing dipped until it was perpendicular to the ground. 左翼下垂至与地面成90度角。