[21,22]. However, once fluorine side chains are attached的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

翻译结果1 翻译结果2 翻译结果3 翻译结果4 翻译结果5

[21,22]。然而，一旦附着氟侧链

(21,22)。然而，一旦氟素侧链附上

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