The two countries are in dispute over the boundaries of their coastal waters.

两国对它们沿海海域的边界是有争议的。

《柯林斯英汉双解大词典》

But these demographic shifts set the boundaries for rich countries' medium-term future, including their ability to service their public debt.

但是，这些人口结构的变化为富裕国家的中期未来设置了障碍，包括他们偿还公共债务的能力。

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The process of demarcating land boundaries between the two countries is accelerating and the two agreements concerning the Beibu Gulf are under implementation.

两国陆地边界勘界进度加快，北部湾两个协定正在付诸实施。

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Including the disparity of views across countries, the French inconsistency following Kosovo, the inability of the UN to deal with issues that arise within a countries boundaries, but nonetheless threaten to have a global effect and last but not least the pivotal issue of Palestine recognition.

BBC: Your comments

All of these problems know no political boundaries, and affect rich countries the same as poorer ones.

BBC: Have your say: Harry Patch

The arrival of the new vessel comes at a time when China is in dispute with a number of neighbouring countries over national boundaries in the East and South China Seas.

BBC: China navy launches new stealth frigate