There e's no need to dress up—come as you are.

没有必要刻意打扮%—你是什么样子就什么样子来。

Come as you are; do not loiter over your toilet.

你就这样地来吧，不要在梳妆上挨延了。

I recall from childhood my family being invited to a "come as you are" party. Guests were to simply come, without worry about what they might wear or bring.

我记得小时候我们一家被邀请参加“即叫即到”派对，客人只需参与派对，却毋须担心要穿什么或带什么。

You are welcome to come and stay as long as you give us plenty of notice.

只要你及时通知，我们都欢迎你来住宿。

You are free to come and go as you please.

你来去自由。