A piece of flat alluvial land by the side of a river, forming part of the floor of the river valley.
Middle English: probably from Old English healh 'corner, nook', related to holh 'hollow'.
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。