顺: Ⅰ介词1.(向着同一个方向) in the same direction as; with 短语和例子顺流而下 go downstream; 顺时针方向 clockwise2.(依着自然情势; 沿着) along; in the direction of 短语和例子顺小道上山 go up the mountain along the path; 水顺着渠道流进地里。 wat
垂直: perpendicular; vertical; squareness; verticality; perpendicularity 短语和例子两线垂直相交。the two lines meet at right angles. 设 ab 垂直于 cd。let ab be perpendicular to cd. 当表面与射线垂直时，射线的强度最大。when a surfa
