(in|with) reference to

关于, 参照

used to indicate a relationship or connection to something

With reference to the proposal, I would like to make some comments.
关于该提案，我想提出一些意见。
In reference to the project, we're almost finished.
关于这个项目，我们快完成了。
With reference to the report, I have a few questions about the findings.
关于报告，我对调查结果有几个问题。
In reference to your email, I'd like to discuss further details.
关于您的电子邮件，我想讨论更多细节。
With reference to the meeting agenda, we need to address item number three.
关于会议议程，我们需要解决第三项。