perpendicular

垂直的、成直角的

Draw a line perpendicular to the base of the triangle.

画一条与三角形底边垂直的线。

直立的、笔直的

The wall must stay perpendicular, or the whole structure will lean.

墙面必须保持直立，否则整栋建物会倾斜。

陡峭的、险峻的

Climbers roped up before tackling the almost perpendicular cliff.

攀登者在挑战那面近乎陡直的崖壁前先系上绳索。

垂直线、垂线

The teacher asked us to drop a perpendicular from the top vertex.

老师要我们从顶点作一条垂线。

垂直位置、直立状态

The old tower is several degrees out of the perpendicular.

那座旧塔已偏离垂直方向好几度。