你收到我关于会议的备忘录了吗？

Did you get my ___memo regarding the meeting?

请阅读管理层关于新政策的备忘录。

Please read the ___memo from management about the new policy.

我需要写一份备忘录来总结今天会议的要点。

I need to write a ___memo to summarize the key points from today's meeting.