What is the relationship between ice and water?
Some people would say that they are just different states of the same substance - a substance in which a molecule consists of two hydrogen atoms and one oxygen atom or its isotopes at different temperatures and pressures.
No, there are differences between the two in terms of state, density, etc. This is just like me as "water", in terms of gender, I am different from him as "ice".
Some people may also think that when ice melts, it is water, and when water solidifies, it is ice. Ice and water, cold and warm, are two opposite states. Now that a substance has been forcibly split into these two states, there is no possibility of mixing between them.
With all due respect, there are really some problems with this philosophical viewpoint that only talks about opposition but not unity.
Don't forget, how is zero degrees Celsius defined? Yes, it is exactly the temperature of the ice-water mixture at standard atmospheric pressure. The fusion of ice and water has become the starting point of our quantitative understanding of "temperature".
What? You mean thermodynamic temperature scale? That would be too professional. When I talk about zero degrees Celsius here, I still want to talk about its relationship with our daily lives.
This is just like me and him, he is ice and I am water. The fusion between the two has become the "origin" of my current life.
The origin is certainly not the starting point, but it is certainly not the end point.
(Preface to "Zero Celsius" by Long Yuhui)
Here are some small additions from the author:
It can barely be regarded as a sequel to "The Sound of Sound". It is not the original work. It is recommended to read the previous work first, otherwise you may not be able to accept some of the settings.
The senior year of high school is approaching, from June 21st to July 31st, a month. I hope I can write an outline.