Based on the relation of geometricobjects and terrain triangular irregular network, the various geometricobjects are divided into two parts in this paper.
根据地物模型与地形三角网关系,将种类繁多地物模型划分为两大类。
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Plato thought Numbers (and geometricobjects such as circles) existed in some abstract, eternal and perfect realm, of which mortals were granted only an occasional glimpse.