a smaller structure added to a main buildinghad a small penthouse built to serve as a toolshed
had a small penthouse built to serve as a toolshed
addition, annex, extension
arm, ell, wing
in the 14th century
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。