noun 下载 🔗分享 灭火器,救火筒 One who, or that which, extinguishes something. Examples : "The extinguishers in the hallway are checked regularly to ensure they work in case of a fire. " 走廊里的灭火器会定期检查,以确保发生火灾时能够正常使用。 utility device machine technology 与AI对话词汇游戏阅读练习