名词
中文翻译：洪水水平线
同义词：
['floodplain', 'floodplain rim', 'floodplain edge']
例句：
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1. The flood-level rim is a critical barrier that protects the town from flooding.
洪水水平线是一道关键的屏障，保护城镇免受洪水侵袭。
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2. The engineer carefully marked the flood-level rim on the map to ensure proper drainage.
工程师在地图上仔细标出了洪水水平线，以确保排水系统的正确布置。
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3. The construction of the flood-level rim has been delayed due to unfavorable weather conditions.
由于不利的天气条件，防洪堤的建设被推迟了。