Definition: a line that divides two areas or forms an edge around an area Level: C1
这些山脉标志着两国之间的边界。
The mountains mark the ___boundary between the two countries.
在当今互联的世界里，地方性问题和全球性问题之间的界限常常很模糊。
In today's interconnected world, the ___boundary between local and global issues is often blurred.
一道栅栏标出了房屋后部的产权界限。
A fence marks the property ___boundary at the back of the house.
