A: Why hasn't she turned up yet? How come?
B: I wish I could know that answer.
A: She's always late. I don't understand it.
B: Oh, here she comes.

A: 她为什么还没出现？怎么回事？
B: 但愿我知道答案。
A: 她老是迟到。真搞不懂。
B: 喔，她来了。

重点解说：

★ turn up「出现，现身」

★ I wish I could ~「但愿我能~」为与现在事实相反的假设，I wish I could swim like a fish.「但愿我能像鱼儿般游泳。」