moving boundary problem

例句：

1. 1. The moving boundaryproblem is a common issue in many fields of science and technology.
   移动边界问题是许多科学和技术领域中常见的问题。
2. 2. In this study, we focused on the moving boundary problem in fluid dynamics.
   在这项研究中，我们专注于流体动力学中的移动边界问题。
3. 3. The moving boundary problem requires careful consideration of the physical properties of the materials involved.
   移动边界问题需要仔细考虑所涉材料的物质属性。