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有一个“空气推动塞子时，热能减小”的演示实验：取一个大口厚玻璃瓶（图１），瓶内装入少量的水，用塞子塞紧，瓶内水面上方有空气和由于水蒸发而产生的水蒸气。通过塞子的开口往瓶里打气，当塞子跳起时，可以看到玻璃瓶中出现了雾。本实验中，塞图１到的，但瓶中出现的雾却?
There is a demonstration experiment “The heat energy is reduced when the air pushes the plug”: take a large glass bottle (Figure 1), fill the bottle with a small amount of water, plug it with a stopper, there is air above the water in the bottle and the water evaporates. Generated steam. The air is pumped through the opening of the stopper. When the stopper jumps up, you can see the fog in the glass bottle. In this experiment, what did you see in Seychelles 1 but the fog in the bottle?