我用了一个邮资已付的信封。
随函附上邮资已付的回信明信片一张。
寄发大量信件的公司现在使用邮资已付机，以节约时间。
Which send out a lot of letters save time by using franking machines.
请在前两份上签字，并用所附的邮资已付信封寄回，第三份文件请妥善保管。
Please sign and return the first two copies using the stamp-paid return envelop. The third copy is for your own safe-keeping.
我们之前用的那家公司答应要寄一个邮资已付的箱子给我们，使我们能将旧的网路设备寄还给他们。
Our former provider promised to send us a postage-paid box to mail their equipment back to them.
我们之前用的那家公司答应要寄一个邮资已付的箱子给我们，使我们能将旧的网路设备寄还给他们。
Our former provider promised to send us a postage-paid box to mail their equipment back to them.
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