someone whose job is to be one of the first people to arrive to deal with an emergency, especially a paramedic, police officer, or firefighter

Emergency responders evacuated several people from the building. 紧急救援人员从大楼内疏散了数人。

I have a husband and a daughter who are emergency responders in the fire service. 我的丈夫和女儿都是消防部门的紧急救援人员。