low-water mark
noun [ C usually singular ] uk/ˌləʊˈwɔː.tə ˌmɑːk/ us/ˌloʊˈwɑː.t̬ɚ ˌmɑːrk/ (also low-water line)
最低水位标记，低潮线
the lowest point on a beach that is reached by the sea at low tide
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。