physieal aging

• 物理老化

physieal aging的用法和样例：

例句

1. Physical aging occurs when bicarbonate in the blood decreases.
   物理老化发生时，碳酸氢根在血液中减少。
2. The physical aging was introduced to the polymer's poling process and the effect of aging time was investigated in this article.
   摘要将聚合物的物理老化引入到极化过程中，并研究了不同温度下的老化对极化聚合物取向稳定性的影响。