thermal elongation

例句：

1. 1. Thermal elongation is a measure ofhow much a material expands when heated.
   热伸长是衡量材料在加热时膨胀程度的指标。
2. 2. In thecase of materials with highthermal elongation, theycan be stretched significantly without breaking.
   对于具有高热伸长的材料，它们可以在不断裂的情况下显著拉伸。
3. 3. Thermalelongation is an important factor indetermining the performance of materials under different temperatures.
   热伸长是决定材料在不同温度下性能的重要因素。