keep someone posted
及时告知某人最新消息
口语·日常沟通或工作汇报
英文释义
To keep someone informed or updated about a situation or information
例句
I'll keep you posted on the project progress as soon as I hear back from the team.
典故来源
源自军事用语，原指在战场上通过哨兵传递最新情报，后来引申为随时向他人更新信息。