网站首页 汉语 德语 英语
A hardpan; (now) specifically one cemented with iron and organic matter, usually in the B horizon of a podzol.
Early 20th century; earliest use found in The Botanical Gazette. From German Ortstein from Ort place + Stein.
礼仪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。