•We scrambled up the nearly perpendicular side of the mountain.我们沿着几乎垂直的山坡吃力地向上爬。

•The wheel rotates about an axis which is perpendicular to the plane.轮子绕着一条与平面垂直的轴旋转。

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•Draw a perpendicular from the vertex of the triangle to its base.从三角形的顶点画一条垂线到底边。

•The wall was leaning at an angle of ten degrees to the perpendicular.墙壁倾斜，与垂直面成十度角。