常見例句用作名詞 (n.)DOD of America is a pentagonal building, which is called Pentagon.美國國防部的辦公大樓是一座五邊形建築物，叫做五角大樓。The office block of U.S.A defense is a pentagonal buliding,ia named pentagon.美國國防部的辦公大樓是一座五邊形建築物，叫做五角大樓。 返回 pentagonally