名词
中文翻译：边界
同义词：
['border', 'line', 'demarcation']
例句：
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1. The boundary between our two countriesis marked by a river.
我们两国之间的边界由一条河流划分。
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2. The bordertown is famous for itsunique cuisine.
这个边境小镇以其独特的美食而闻名。
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3. The demarcation of the newborder has caused much controversy.
新边界的划定引发了广泛的争议。