pencil something/someone in
phrasal verb with pencil verb [ T ] uk/ˈpen.səl/ us/ˈpen.səl/ -ll- or -l-
草拟，初定
to arrange for something to happen or for someone to do something on a particular date or occasion, knowing that the arrangement might be changed later
We'll pencil in the dates for the next two meetings and confirm them later. 我们将暂定一下接下来两次会议的日期，稍后再加以确认。