恍如隔世　

◎ 恍如隔世 huǎngrúgéshì

[as if being cut off from the outside world for ages;become like an old remembrance;feel like sth.was another world] 恍惚如同相隔了一辈子。喻事物变化发展很快,变化很大

月下重遇,恍如隔世,故人相对久无语