名词
中文翻译：Unknown
同义词：
['average sea level', 'long-term mean sea level', 'meansea level over many years']
例句：
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1. The city's annualflood risk is closely linked to the multi-year mean sea level rise.
该城市的年度洪水风险与多年平均海平面上升密切相关。
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2. The scientists used satellite data tocalculate the multi-year mean sea levelfor the region.
科学家们使用卫星数据计算了该地区的多年平均海平面。
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3. Thegovernment has been working on a plan tomitigate the impact of climate changeon the multi-year mean sea level.
政府一直在努力制定一个计划，以减轻气候变化对多年平均海平面的影响。