physical file name

例句：

1. 1.The physical properties of the material are important for its use.
   这种材料的物理性质对其使用很重要。
2. 2. The scientist conducted experiments to study the physical properties of the new material.
   科学家进行了实验，研究新材料的物理特性。
3. 3.The physical characteristics of the planets were studied by astronomers.
   天文学家研究了行星的物理特性。