求翻译：任何物体的体积，都是由若干个相互联系、方向转折不同，且有透视变化的体面组成。分析、理解、表现物体的体面转折以及它的透视变化关系，并且正确地表现出物体起伏转折的深度，对塑造物体的立体感，有关键性意义是什么意思？

The volume of any object, by a number of interrelated, turning different directions, and there is a decent perspective changes the composition. Analysis, understanding, decent performance object and its transition relation between perspective and turn right rolling demonstration of the depth of the

Any the volume of the object, are composed of a number of interrelated, direction, and turning a different perspective of decent Composition changes. analysis, understanding, performance of objects as well as decent turning it in perspective, changing relationships and correctly displayed objects tu

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Whatever size, are composed of several interrelated, turning in the direction of different, and decent composition changes of perspective. Analysis, understanding, and to show decent turn of objects and its perspective on the changing relationship between, and express the depth of the object up and

The volume of any object, by a number of interrelated, turning different directions, and there is a decent perspective changes the composition. Analysis, understanding, decent performance object and its transition relation between perspective and turn right rolling demonstration of the depth of the