| 释义 |
per.pen.di.cu.larH.pV:7p[m5dIk7jJ7lE5, $.pV:r7pEn5dIk7jU:7lLnspecialized垂线Draw a perpendicular (= a perpendicular line) from the vertex of the triangle to its base. [C]从三角形的顶点划一条垂线到底边。The perpendicular is a perpendicular position or direction.垂直面，垂直方向The wall was leaning at an angle of ten degrees to the perpendicular. [U]墙和垂直面成十度角。
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