You're out of touch with reality.

　　你脫離了現實。

　　Will time travel ever become a reality ?

　　時光旅行真的會成為現實嗎？

　　Did the reality of war finally hit home?

　　人們最終深刻認識到戰爭的現實了嗎？

　　He seems completely divorced from reality.

　　他似乎完全脫離了現實。