national boundaries
definitions
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The physical, geographical, or political lines that separate one sovereign state or country from another.ja: 国境
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The limits of a nation's legal authority, sovereignty, or territorial jurisdiction.ja: 主権の範囲
examples
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The dispute arose over the exact location of the national boundaries.
国境の正確な位置をめぐって紛争が生じた。
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International laws are designed to respect national boundaries and sovereignty.
国際法は国境と主権を尊重するように設計されている。