extinguishing medium

基本解释

EXTINGUISHING MEDIA : Water spray, dry chemical powder, foam or carbon dioxide.
灭火剂：雾状水，干粉，泡沫或二氧化碳。
08translation.cn
Fire protection. Fire extinguishing media. Halogenated hydrocarbons. Part 1 : specification for halon 1211 and halon 1301.
防火。灭火介质。卤代烃。第1部分：聚四氟乙烯1211和聚四氟乙烯1301规范。
However, the idea of children hasn't been accept for a long time, another challenge come across, that is childhood is extinguishing because of the utilization of electronic media.
遗憾的是，人类社会有关儿童的观念刚确立不久，就遇到了挑战——许多专家认为“童年”正因电子媒介的使用而消逝。