postal rate

• 邮费

postal rate的用法和样例：

例句

1. Postal charges have risen again.
   邮费又上涨了。
2. An air-mail letter in the form of a lightweight sheet of stationery that folds into its own envelope for mailing at a relatively low postage rate.
   航空邮件写于轻薄纸张之上，装入专用信封之中以较低邮费投递的航空信件。