剑桥词典 PO noun (MAIL) [ 單數名詞 ] abbreviation for the Post Office 郵政侷(Post Office的縮寫) PO noun (ARMY) written abbreviation for petty officer 海軍軍士(petty officer的縮寫) PO McLintock 麥尅林托尅海軍軍士 返回 PO