first-order transition

• 一级相变

first-order transition的用法和样例：

例句

1. It is shown that the pump parameter and intensity noise correlation time are the major factors of the first-order-like transition.
   研究结果表明，抽运参量和噪声相关时间是激光系统出现一级相变类比的关键因素，角噪声相关时间对强度谱分布中的线宽影响较大。