从7天变更为14天，即我们需要邮寄文件给你们的翻译：Changes from 7 days to 14 days, and that we need to mailing documents to you 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

Change from 7 days to 14 days that we need to mail documents to you

Changes from 7 days to 14 days, and that we need to mailing documents to you

From 7 days changes is 14 days, namely we need to mail the document to give you

From 7 days to 14 days, that is, that we need to send files to you

Changes from 7 days to 14 days, and that we need to mailing documents to you