"the film cut back to an earlier event in the story"
而气流速度和火焰传播速度的相互关系对回火有很大的影响.
All photos were taken at an angle to prevent camera flash - back.为防止照像机闪光反弹﹐以下每一张照片拍摄时都带有一些角度.
From that year til now, what had happened? Let flash back to history.当年到今日, 到底发生甚麽事? 让我们翻开历史.