privy

1. ADJ If you are privy to something secret, you have been allowed to know about it. 允许获知的; 知情的; 了解内幕的[正式] [v-link ADJ 'to' n]

Only three people, including a policeman, will be privy to the facts. 这些情况只会有三个人知道，其中包括一名警察。