事过境迁

Explanation: Environment: the case; move: change. Thing is over, the situation has changed. 　　Usage: Joint type; as predicate, object, clause; with the passage of time 　　Source: Qing Yi Suo "Yellow Hydrangea": "true rest for several days, yellow hydrangeas and yellow Tongli overtaken by events, has not heart." 　　Examples: Lu Xun's "canopy _set_ is not a gossip": "But ~, 'Sakamoriba' has been digested, absorbed, only seems to be no reason for 'fair words' nothing. 　　Riddle: Melon trial Fei Thesaurus:  that was one situation,and this is another; times have changed, circumstances change with the passage of time, Qingsuishiqian, Popular easily when moved, When the river rises, the boat floats high., Have changed, (literally) When water rises, the boat rises with it.--When the person one relies on rises in the world, one rises with him