单词	polyacrylonitrile
释义	polyacrylonitrile noun poly·​ac·​ry·​lo·​ni·​trile ˌpä-lē-ˌa-krə-lō-ˈnī-trəl  -ˌtrēl : a polymer of acrylonitrile used often as fibers Word History First Known Use 1935, in the meaning defined above
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