He put a stamp on the envelope.

他在信封上盖了一个印章。

Can you help me put this stamp on?

你能帮我贴上这张邮票吗？

The stamp on this postcard is from Japan.

这张明信片上的邮票来自日本。

The sender forgot to put a stamp on the envelope.

寄件人忘记在信封上贴邮票。

She put a stamp on the envelope before mailing it.

她在信封上贴了一张邮票后寄出了。

Don't forget to put a stamp on before you post a letter.

寄信前别忘了贴邮票。

The affixation of the stamp on the envelope is necessary for mailing.

信封上邮票的附加是邮寄所必需的。

Marconi placed a permanent stamp on the way we live.

马可尼在我们的生活方式上留下了永久的印记。

One would go to prison if they put a stamp on upside down.

如果有人把邮票贴反了，他们就会进监狱。

That is, if you put a postage stamp on upside down, you'll go to prison.

也就是说，如果你把邮票贴反了，你就会进监狱。