I have always wondered what it means?

我一直想知道是什么意思。

youdao

I have always wondered why it is like that.

我一直在想为什么会是那个样子？

youdao

I have always wondered at the passion many people have of going abroad.

我在想，为什么这么多的人对出国抱有如此大的热情呢。

youdao

We didn't have planes when I was younger and I have always wondered what it was like.

BBC: Old and bold

Since I have learned the hard way that a diet Coke gulped on the sly the final day of your stay will almost surely show up on your bill, I have always wondered about the robe scenario.

CNN: Is it OK to steal hotel amenities?

I've always wondered who these people are who have the time to write thousand-word reviews of things like heated toilet seats.

WSJ: In the Driver's Seat