劍橋詞典a box with a number in a post office to which your letters and parcels can be sent and from which you can collect them 郵政信箱 Write to PO box 123. 來信請(qǐng)寄123號(hào)郵政信箱。 a PO box number 郵政信箱號(hào) 返回 PO box