线，按照几何学的定义，它只具有位置和长度，而不具有宽度与厚度。然而，在造型上，为了使我们能看得见，线必然是具有位置、长度和宽度的。点、线、面是密不可分的造型三要素，线来自于运动的点，又在运动中创造着面。从广义上来看，凡是具有一定空间、结构、运动的物体莫不 Line, according to the definition of geometry, has only position and length, but not width and thickness. However, in modeling, in order for us to see, the line must have a position, length and width. Point, line, surface is an integral part of the shape of the three elements, the line from the point of exercise, but also create a movement in the face. In a broad sense, all objects that have a certain space, structure, and movement do so