How to say Lingjie in English?

[sky753]

Well, that's called sublimation (升华) -- the change of state from solid to gas, as when ice turns to water vapor or dry ice to carbon dioxide, promoted by raising the temperature.

There's also triple point (三态点) -- of a substance, the temperature and pressure at which three phases (for example, gas. liquid, and solid) of that substance coexist in thermodynamic equilibrium.

Could you provide us with the Chinese characters, please.

I first learn from here that a substance can exist in three states at the same time under particular conditions. I think it should be called as "三态点“.