我们在大约三周前就已经发出了聚会邀请函。

We sent out the party invitations about three weeks ago.

youdao

我已经寄了生日聚会邀请函给你。

I have sent the birthday party invitation to you.

youdao

也许在未来的某一天的某个人将发现邀请函上的信息，使用时间机器来到我的聚会，证明时间旅行时可能的。

Maybe one day someone living in the future will find the information on the invitation and use a wormhole time machine to come back to my party, proving that time travel will, one day, be possible.

youdao