名词
中文翻译：Unknown
同义词：
['average annual water level', 'mean annual sea level', 'mean annual tide level']
例句：
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1. The river's mean annual water level is 5 meters above sea level.
这条河的平均年水位比海平面高5米。
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2. The government has set a goal to reduce the mean annual sea level rise by 0.5millimeters per year.
政府设定了一个目标，即每年将平均年海平面上升量减少0.5毫米。
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3. The scientists used data from satellites to predict the mean annual sea level change for the next decade.
科学家们利用卫星数据预测了未来十年的平均年海平面变化。