physical change and chemical reaction的意思|示意

Besides, Blending, chemical reaction and physical treatment are important ways to change the properties of films.

此外，共混、化学改性和物理处理也是改变壳聚糖膜性质便捷、重要的方法。

The existence of seepage through soil mass makes the shearing strength change (mainly become smaller)because of the mechanical, physical and chemical reaction of water flow.

当土体中存在渗流时，由于水流的力学、物理、化学等作用，会使土体的抗剪强度发生变化（主要趋势是使抗剪强度降低）。