postage
/ˈpəʊstɪdʒ/noun
mass noun
1- the sending or conveying of letters and parcels by post邮寄, 邮递：
proof of postage is required.
需要有邮寄证明。
1.1
- the amount required to send a letter or parcel by post邮资, 邮费：
the prices given here include postage and packing.
这个价格包括邮费和包装费。