Let's say you also e-mailed a copy of the report to a good friend and colleague who has done research on a similar topic in the past. You asked for a few suggestions, and the document is now returned by e-mail with your colleague's suggestions.
假设您还把这份文档抄送给了您的一位要好的同事，他以前也做过此类的研究。您请他给予指点并得到了修改文档。