基本解释n.跑龙套角色；配角演员；临时队员同根派生 英汉例句用作名词 (n.)He was on the cusp between small acting roles and moderate fame.他这个配角演员现在已是小荷初露尖尖角。We have several alternates on our team.我队有几名替补队员。Firemen turned their hoses on the flames.消防队员将水管对准火苗。