1pointing straight up垂直VERBS | ADVERBVERBS➤be垂直ADVERB➤almost, nearly幾乎/差不多垂直◇an almost perpendicular staircase一段幾乎垂直的樓梯perpendicular
adjective²
2at an angle of 90° to sth成直角VERBS | ADVERB | PREPOSITIONVERBS➤be成直角ADVERB➤approximately大約垂直➤almost幾乎垂直➤mutually互成直角◇two mutually perpendicular directions兩個互為直角的方向PREPOSITION➤to與⋯成直角◇The axis of the moon will now be exactly perpendicular to that of the earth.月軸此時與地軸正好成直角。