二手烟雾指人们燃烧卷烟、比迪烟和水烟等烟草制品时产生，并弥漫在餐馆、办公室或其他封闭空间内的烟雾。

Second-hand smoke is the smoke that fills restaurants, offices or other enclosed spaces when people burn tobacco products such as cigarettes, bidis and water pipes.

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在time 40，就可以开始看到大火在燃烧并最终占据整个空间。

At time 40, you can begin to see fires burning that eventually take over the space.

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燃烧的空间位于气缸中部，在两个活塞之间。

The combustion space is in the middle of the cylinder between the pistons.

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