在各个国家的边界之内，每个人都有自由移动和居住的权利。
Everyone has the right to freedom of movement and residence within the borders of each State.
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.
如果某个容器对象的子对象可以在该容器的边界内自由移动、调整大小或旋转，子对象也必须支持此控件模式。
This control pattern must also be supported by the children of a container object if the children can be moved, resized, or rotated freely within the boundaries of the container.
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