person in the know

基本解释

You really need to have more consideration for others. You aren’t the only person in the world you know!
你真该多为别人着想，要知道你并不是这世上唯一的一个人。
In an effort to dramatically increase access to HIV treatment and prevention, Lesotho will launch the world's first plan to have every person in the country know their HIV status.
为努力显著增加获得艾滋病毒治疗和预防，莱索托将启动全世界首项计划，使该国每一个人都了解自己的艾滋病毒状况。
The agreement principle from the person in the know has already not been suitable in modern medical research, and should be replaced by the contract principle from the person in the know.
知情同意原则已经不适应现代医学研究，而应为知情契约原则所代替。

The interviewer wants to know if the person understands the demands of life as a medical student and doctor in training.
Okay. I know one person in the department who is one of the most connected people I know on earth.
好的，我认识系里的一个人,他是我认识的人中连接性最强的人。
耶鲁公开课 - 心理学导论课程节选
Then I know someone else in the department and, as best I know, I'm the only person she knows.
我也认识系里另一个人，据我所知，我是她唯一认识的人。
耶鲁公开课 - 心理学导论课程节选

Beyond fear and treating the event as a competition, networking nights often leave those attending in the same comfort zone they arrived in: see a person you know, spend the majority of the night by their side, and meet a few new people but not nearly as many as you hoped had you decided to branch off early and look solo.
FORBES: 7 Everyday Places To Start Networking Face-To-Face At