即竖直方向的单位向量。
你的目标是竖直方向上下的坚定的握手。
在这幢建筑的可移动部分，橡胶软管在竖直方向上连着。
Rubber hoses connect the uprights to their mates in the mobile part of the building.
从而法向量的方向是竖直向上或向下的。
The normal vector is just sticking straight up or straight down.
将四只手指竖直并拢并向大拇指方向闭合即可。
Hold the fingers straight and then close them against the thumb.
门柱一竖直的柱子，在其上有一大门，或一大门朝此方向关闭。
An upright post on which a gate is hung or against which it closes.
门柱一竖直的柱子，在其上有一大门，或一大门朝此方向关闭。
An upright post on which a gate is hung or against which it closes.
应用推荐