at least one auxiliary line, which has an axis, it is with the assembly of the power line side by side through the inner skin armor set with its axis with the axis of coexistence of various power line within a plane;
基于1个网页-相关网页
Pick any two perpendicular directions Then the same entity, the same arrow which has an existence of its own, independent of axis, can be described by you and me using different numbers.
选取两个互相垂直的方向,这样同样的物体,同一矢量,并且是独立于坐标轴而存在的,可以被你和我用不同的数字来描述
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