A：Hey,what's the matter?
嗨，怎么啦?
B：It doesn't matter.I just feel a little dizzy.
没关系。我只不过觉得迷糊。
A：Are you sure that this has nothing to do with sleep?
你肯定这跟睡眠无关吗?
B：I don't know.
我不知道。