音标发音英式音标 [siːˈef]美式音标 [siːˈef]英式发音 美式发音 基本解释abbr.成本加運費(=Cost and freight)abbr.比較(=compare)同根派生 cf.相关词英英字典劍橋英英字典 used in writing when you want the reader to make a comparison between the subject being discussed and something elsecf.剑桥字典cf.柯林斯字典