The ground experimental studies on flame spread across solid fuel surface were conducted under various ambient pressures.
本文在地面环境和不同环境压力下，对热薄燃料表面的火焰传播进行了实验研究。
You are always relying on ambient light for the mid-ground and background.
对于中远距离和背景，你依然要依赖自然光。
You are always relying on ambient light for the mid-ground and background.
对于中远距离和背景，你依然要依赖自然光。
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