free boundary problem的用法和样例：
例句
- The intent of this study is to discuss the critical property of a free boundary problem of a parabolic integro-differential equation.
摘要讨论一类抛物积微分方程自由边界问题解的渐近性。 - According to the changement of the rubbery region, the diffusion of solvents in the rubbery region will be a free-boundary problem.
由于胶状区域的变化，在胶状区域的溶液扩散将是一个自由边界问题。
