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。
Since glass has no sharp melting point, most types can be shaped while hot and plastic by many techniques, mostly blowing or molding. See also volcanic glass.
由于玻璃没有明确的熔点，因此大多数种类的玻璃可以在烧热时使用多种技术来塑形，以吹制和模具浇铸两种方法为主。
Crystalline resins have a very sharp melting point and require significant energy (heat) input before they undergo a phase change and melt to a low viscosity.
结晶型树脂有很尖锐的熔点，要求大量的热能才能进行相转变并熔融到一种低粘状态。
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