名词短语
中文翻译：在边界上
同义词：
['at the border', 'on the boundary', 'at the edge of', 'at the limits of']
例句：
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1. The border patrolkeeps watch at the border to prevent illegal crossings.
边境巡逻队在边境上巡逻，以防止非法越境。
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2.The artist painted a picture of the border between two countries.
这位艺术家画了一幅两国边界的画。
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3. The scientists are studying the effects of climate change on the border regions.
科学家们正在研究气候变化对边境地区的影响。