... level of dead water 作古水位 level of ebb tide 退潮水位 leveller 平土器平地机 ...
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level l of ebb tide 退潮水位
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Flood and ebb, it's about timing: Tide is a phenomenon of regular rising and falling of sea level mainly influenced by the gravitation of sun and moon.
涨潮退潮，掌握时机：潮汐是一种有规律的海面升降现象，主要是受太阳与月亮引力的影响。
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