变化无常

Explanation: Impermanence: not the norm. That things change very often, there is no regularity. 　　Usage: The main predicate; as the predicate attribute; for a variety of things or people's emotions, facial expressions, etc. 　　Source: Qin Zhuang "Zhuangzi world": "suddenly desert intangible, volatile." 　　Examples: Recently the weather ~, while blue skies, while another rain-soaked. 　　Results: Cat face Dog face short a time; October weather 　　Postscript: Cat face Dog face short a time; October weather Thesaurus:  Infinite mystery, change constantly, Infinite variety, be most changeful, vagary, vary contingency, there is a sudden change in the situation, make still further progress, change constantly like cloud and wave, lubricity, vagrancy, diversity, ebb and flow contingency, ebb and flow boundless, obliterate, sudden change of a situation, Changing situation, Yunjuefenggui, Ghost out of power into, Ghost out empathic, Ten of nine changes, give oneself a shake and change into another form, Hey presto!, chop and `change keep changing one's plans, opinions, etc