邮费 的中文句子和英文句子

寄一封航空信的邮费要多少？

What is the postage for an air letter?


帐款是10美元，再加上一美元邮费。

The bill was USD10, plus USD1 for postage.


寄往加拿大的航空信要多少邮费？

How much is the postage for an airmail letter to Canada?