1641[see improved 2].
1709T. Molyneux in Ir. Archæol. Soc. Misc. (1846) I. 177 From thence to Moat, thro' a well improv'd, well planted country.
1735Berkeley Querist §413 A handsome Seat amidst well-improved Lands.
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。