If it was directly transcribed there'd be regions that are important for making insulin and regions that are not.

如果直接转录的话,那被转录的序列中就会既包括了,和生成胰岛素有关的重要区域,也包括了与之无关的区域

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There is some mixture of them.

实际情况是生成物与反应物的混合。

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Those regions that are not are spliced out during RNA processing to form the mRNA transcript that's used to make the protein.

而这些与生成胰岛素无关的区域,在RNA剪接过程中就被剔除,从而生成转录蛋白质的mRNA

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