I hope that you can join us one day.

我希望有一天你能加入我们。

So keep studying, and I hope that you can join us one day.

所以继续学习，我希望有一天你能加入我们。

Sabrina:You can join us after dinner. The more the merrier.

你跟你女朋友可以吃完饭再加入我们，人多比较热闹。

Sabrina: You can join us after dinner. The more the merrier.

你跟你女朋友可以吃完饭再加入我们，人多比较热闹。

In despite of the fact that I don't like you, you can join us anyway.

虽然我不喜欢你，你仍可加入我们的行列。

We are inviting… on… and I think it would be a good idea if you can join us.

我们将在……邀请……，如果你也能来的话，我们会很高兴。

But we are lack of some funds, we hope you can join us to become a shareholder.

但是我们还缺少一点资金，我们想邀请你入股。

We hope that you can join us at Harmonica University, and also learn the 10 hole harmonica.

我们也希望你能加入口琴草堂，来一同体验口琴吹奏的乐趣。