发布网友 发布时间:2024-10-24 05:45
共1个回答
热心网友 时间:2024-10-30 05:35
1. In winter, when water is boiled in a pot, the "white vapor" is only visible slightly above the level of the pot's mouth.
2. However, the "white vapor" is not visible at the point where the pot's mouth connects.
3. This is because the temperature at that point is very high, causing the water vapor to emerge from the mouth to not condense back into liquid.
4. But at a slightly higher position, the temperature is relatively low, causing the water vapor to condense back into water droplets, that is, the "white vapor."