Remember to stick a stamp onto the envelope before you post it.
寄信之前要记住在信封上贴邮票。
You must put a stamp on the envelope before you post it.
寄信以前，你必须在信封上贴上邮票。
You must stamp these letters before you post them.
信要加盖邮戳后才能邮寄出去。
Many old you mind buying a stamp when you get to the post office?
你到邮局时给我买一张邮票好吗？
Stick a stamp on the envelope before you post the letter.
寄信前要在信封上贴上邮票。
Stick a stamp on the letter and then post it.
把信贴上邮票，然后寄出去。
You must stamp these letters before you post them .
信要加盖邮戳后才能寄出。
You must stamp these letters before you post them .
信要加盖邮戳后才能寄出。
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