We will appreciate if you pay postage for the samples.
如贵方能付样品邮资，我方将不胜感激！
It is our company rule. We will appreciate if you pay postage for the samples.
这是我司的规定。如贵方能付样品邮资，我方将不胜感激！
Last but not least, you have to pay for postage.
最后，你还不得不付邮资。
Last but not least, you have to pay for postage.
最后，你还不得不付邮资。
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