The cloud (such as water cloud), which is formed by the inert substance suspending in the air, can prevent or suppress flame and shock wave's propagation.
惰性物质悬浮于空气中形成的云雾(例如水雾)能阻挡或抑制火焰和激波传播。
If so, then the properties of the waves suggest that the ratio of oxygen to hydrogen in the water cloud where the waves propagated is 10 times as high as in the sun.