flame collapse的用法和样例：
例句
- In pool fire suppression tests it was observed that the fire extinguishment by flame cooling took a very short time, while extinguishment by surface cooling took a longer time.
在油池火灭火实验中发现通过火焰冷却灭火时所需时间较短，而依靠燃料表面冷却灭火时则时间较长。 - If it is necessary to extinguish the flame in order to get to a place where the flow of hydrogen can be shut off, a dry powder extinguisher is recommended.
如果为了进入可以切断氢气流的地方而有必要灭火的话，推荐使用干粉灭火器。
