proeutectic

例句：

1. 1. The proeutectic temperature is the lowest temperature at which two or more pure substances can melt together without separation.
   共晶温度是两种或多种纯物质在不分离的情况下可以熔化在一起的最低温度。
2. 2. During the solidification process, the liquidus and proeutectic temperatures are important factors to consider.
   在凝固过程中，液相线和共晶温度是需要考虑的重要因素。
3. 3. The proeutectic reaction is a chemical reaction that occurs at the eutectic point where two or more pure substancesmelt together.
   共晶反应是在共熔点发生的化学反应，在此温度下两种或多种纯物质会熔化在一起。