The sublimation line separates the solid and vapor regions The vaporization line separates the liquid and vapor regions it ends at the critical point. The elting li。 separates the solid and liquid regions The three lines meet at the triple point. Triple point(三相点):l! three phases coexist in equilibriun (三种相态以平衡共存) Critical point(临界点): The point at which the saturated liquid and saturated vapor states are identical No distinction can be made between liquid and vapor phases above the critical poin (临界点就是气相与液相一致的状态点温度高于临界 点之上,气相与液相没有明显的区别The sublimation line separates the solid and vapor regions; The vaporization line separates the liquid and vapor regions; it ends at the critical point. The melting line separates the solid and liquid regions; The three lines meet at the triple point. Triple point(三相点）：all three phases coexist in equilibrium. (三种相态以平衡共存) Critical point (临界点): The point at which the saturated liquid and saturated vapor states are identical. No distinction can be made between liquid and vapor phases above the critical point. (临界点就是气相与液相一致的状态点,温度高于临界 点之上,气相与液相没有明显的区别)