the mean difference in water level between high and low tides at a given location某一特定地点涨潮和落潮时水位的平均偏差

The causeway to the island is only accessible at low tide.去往岛上的堤道只有在落潮期才通行。

The low tide of self-esteem had marooned Rangers' championship aspirations in the autumn.流浪者队的士气陷入低谷, 这使其在秋季夺冠的愿望化为泡影。