你可以在厨房的水槽里做实验。拿两个相同的杯子，一个灌热水，一个灌冷水。
You can demonsrate this for yourself at the kitchen sink. Take two mugs of the same size and fill one with hot water and the other with cold.
你可以在厨房的水槽里做实验。拿两个相同的杯子，一个灌热水，一个灌冷水。
You can demonsrate this for yourself at the kitchen sink. Take two mugs of the same size and fill one with hot water and the other with cold.
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