1A flat-bottomed boat used as a float to support a temporary bridge, etc.
2A motorized boat with a hull constructed of pontoons or sponsons and a large flat deck.
Early 18th century.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。