无定形区是由因构象复杂而未能结晶的分子和由于分子量的差异而被排斥于微晶之外的分子，以及束缚分子等组成。
自然发酵主要作用于淀粉的无定形区，对结晶区的结构影响不大。
The natural fermentation mainly affected the amorphous region of the starch granule structure.
交联反应主要发生在棉纤维的无定形区，对晶区结构基本没有影响。
The cross-linking reaction mostly occurred in amorphism region so that almost no influence to crystal structure of fibre.
结果表明，气体的透过主要发生在PMP的无定形区域，但也在PMP的晶区进行。
The results showed that gas permeation mainly occurs in amorphous region of the PMP, but also in the crystalline region.
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