There is no generally accepted taxonomy into which all computer networks fit, but two dimensions stand out as important: transmission technology and scale.
不存在被普遍接受的所有计算机网络都是用的分类法，但是有两个标准很重要：传输技术和规模。
Polymers may consist of long chains of unbranched or branched monomers or may be cross-linked networks of monomers in two or three dimensions.
聚合物可能包含由无支链的或有支链的单体组成的长链，也可能是单体连接的耳维或三维网状结构。
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