热传导问题于高温条件下，往往是可移动边界问题。
The heat-conduction problem is often a movable boundary problem under the high temperature.
为了解决烧蚀移动边界问题，采用了在动坐标系上建立有限元素方程。
The finite element equation is formulated with moving coordinate system in order to solve a typical problem.
该问题可描述为一个具有两条移动边界的自由边界问题。
The problem can be illustrated as a free boundary problem with two moving boundaries.
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