我不太明白

不过有件事，我不太明白？

But there's one thing I don't quite understand.

— 幽灵公主 (1997)

至于让我恢复健康那一部分，我不太明白。

I’m not quite sure about the part where I’m supposed to get better.

我不太明白他说什么。

I don't really understand what he's saying.