macrocavity

例句：

1. 1. The scientist used a microscope to observe the microscopic details of the cell.
   科学家使用显微镜观察细胞的微观细节。
2. 2.The engineer designed a macrocavity for the machine's internal components.
   工程师为机器的内部组件设计了一个宏观腔。
3. 3.The researcher found that the macrocavity in the planet's core could be responsible for its magnetic field.
   研究人员发现，行星核心中的宏观腔可能是其磁场的原因。