网站首页 汉语 德语 英语
A layer of cells which develops at the base of a pedicel, petiole, etc., and then breaks down, causing the flower, leaf, etc., to fall off.
Early 20th century; earliest use found in Bulletin of the Torrey Botanical Club.
雅致网英汉双解词典包含236457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。