headcount          
noun [ C ] uk/ˈhed.kaʊnt/ us/ˈhed.kaʊnt/
 数人头,清点人数
the act of counting how many people are present in a place
  The teacher did a quick headcount before we all got back on the bus. 在我们回公共汽车之前,老师清点了一下人数。 
  某一处(或某公司)的人数
the number of people who are in a place, at an event, or employed by a company
  Times were hard, and the company was unwilling to increase the headcount (= employ more people). 艰难时期,公司不愿意增加雇员。