柯林斯词典surface mail 1. N-UNCOUNT Surface mail is the system of sending letters and packages by road, rail, or sea, not by air. 平邮 Goods may be sent by surface mail or airmail. 货物可通过平邮或空运发送。 返回 surface mail剑桥词典a way of sending letters , parcels , etc. by road , sea , or train and not by aircraft , or things sent in this way 平邮，平信，普通邮件 I sent the parcel by surface mail . 我用平邮把包裹寄了出去。 返回 surface mail