Definition (数量)
to determine the number of individuals present in a specific location or group
计算在场人数
Before the meeting starts, the manager will usually count heads to ensure all relevant personnel are present.
会议开始前，经理通常会清点人数以确保所有相关人员都在场。
The group leader needs to count heads before starting any activities to ensure no one is lost.
在开始任何活动之前，小组领导者需要清点人数以确保没有人走失。
We need to count heads so we can order enough meals.
我们需要清点人数，这样我们才能订购足够的餐点。