常见例句双语例句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。 返回 level of ebb tide