What are the 4 main elements of the Incident Command System?
事件指挥系统的 4 个主要元素是什么？
Five key functional areas make up the Incident Command System: Command, Operations, Planning, Logistics, and Finance/Administration.
事件指挥系统有五个关键功能领域：指挥、运营、规划、后勤和财务/行政。