They discovered a first order phase transition, a discontinuity, in liquid hydrogen between a molecular state with low conductivity and a highly conductive atomic state.
他们发现了一个不连续的一级相变，这个相变是在液态氢低电导率的分子态和高电导率的原子态之间。
For smaller clusters, there is no clear characteristic of first-order phase transition during the melting, implying a coexistence of solid and liquid phases due to finite-size effect.
对于较小的团簇，融化曲线没有出现清楚的一级相变特征，意味着由于尺寸效应导致的固态液态共存。
The results show that the laser process in different conditions possesses the characteristics of the first order or the second order phase transition. Laser is a typical non-equilibrium phenomenon.
结果表明，在不同条件下的激光形成过程与平衡相变中一级相变或二级相变的特性相对应，激光是非平衡态有序结构形成的典型现象，并且还展示出非平衡相变的新的特点和规律。
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