名词中文翻译
中文翻译：下界
同义词：
['lower limit', 'lower bound']
例句：
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1.The lower boundary of the lake is marked by a tall tree.
湖的下边界被一棵大树标出。
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2. The lower boundary of the region is defined by the river.
该地区的下边界由河流界定。
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3.The lower boundary of the forest is where the trees stop growing.
森林的下边界是树木停止生长的地方。