national boundaries
definitions
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The physical, geographical, or political lines that separate one sovereign state or country from another.zh: 国界
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The limits of a nation's legal authority, sovereignty, or territorial jurisdiction.zh: 主权范围
examples
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The dispute arose over the exact location of the national boundaries.
争端源于国界的准确位置。
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International laws are designed to respect national boundaries and sovereignty.
国际法旨在尊重国界和主权。