Crystalline polymers have an ordered molecular arrangement, with a sharp melting point.

结晶质聚合物具有规则的分子排列及明显的熔点。

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Any type of solid or semi solid organic material of natural or synthetic origin, generally of high molecular weight with no defined melting point. Most resins are polymers.

一类固体或半固体的天然的或合成的有机材料，一般为无清晰熔点的高分子量材料，多数树脂为聚合物。

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Some important characteristics of polymers include their size (or molecular weight), softening and melting points, crystallinity, and structure.

聚合材料具有一些重要特性，包括尺寸(或分子量)、软化及熔化点、结晶度和结构。

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