可到头来，我只需要一点运气。

And, after all, I only needed a little luck.

youdao

我只需要一美元，但他给了我两美元。

I only want a dollar, but he has given me two.

youdao

所以，我只需要一个非常粗略的想法及大约的费用。

And then, I only need a very rough idea of how much it might cost.

youdao