加法混色：混和加色法原色，使它与某一指定颜色相似。
Additive colour mixing: The mixing of additive primaries to match a specific colour.
同时，这两个超声速燃烧室内的凹槽结构能起到增强掺混和稳定火焰的作用，使燃烧室后部燃烧区域增大。
Besides, the cavities in both types of combustors enable the fuel to be mixed more fully and also stabilize the flame, enlarging the combustion area in the rear parts of the combustors.
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