劍橋詞典 PO noun (MAIL) [ 單數(shù)名詞 ] abbreviation for the Post Office 郵政局(Post Office的縮寫) PO noun (ARMY) written abbreviation for petty officer 海軍軍士(petty officer的縮寫) PO McLintock 麥克林托克海軍軍士 返回 PO