low tide
(also low water),
(a) tide when at its lowest level 低潮; 低水位.
(b) time when this occurs 低潮期; 低水位期. ,low-`water mark
(a) lowest point reached by the water at low tide 低潮线; 低水位线.
(b) (fig 比喻) lowest or worst point 最低点; 最坏程度
the low-water mark of the company's fortunes 公司业绩的最低点.