briefing
noun [ C or U ] uk/ˈbriː.fɪŋ/ us/ˈbriː.fɪŋ/
简报，简要介绍；简明指示；情况介绍会
information that is given to someone just before they do something, or a meeting where this happens
They received thorough briefing before they left the country. 在离开该国之前，他们得到了详细的指示。
We had to attend a briefing once a month. 我们每月必须参加一次情况介绍会。