physical volumes

例句：

1. 1. In the study of quantum mechanics, the concept of physical volume is crucial.
   在量子力学研究中，物理体积的概念至关重要。
2. 2. The engineer measured the physical volume of the container to ensure it could hold the material.
   工程师测量了容器的物理体积，以确保它能够容纳材料。
3. 3. The researchers found that the physical volume of the sample had changed significantly.
   研究人员发现样本的物理体积发生了显著变化。