What is an idiom of clock weather forecast chart?

[ definition] Instantaneity: a very short time of blinking and breathing; Ever-changing: there are many changes. There have been many changes in a very short time. Describe a lot of changes quickly.

[ out] Song Hu Hong's "Inscription on the Temple": "The wind and cloud change rapidly; It's futile to run around in the world of mortals. "

[ shape recognition] instant; Can't write "Shun".

[ modern] ever-changing situation

[ antonym] static and stagnant

[ usage] is mostly used in written language. Generally used as predicate and attribute.

[ structure] is too formal.

[ Discrimination] The difference between ~ and "unpredictable" lies in: ~ focuses on "ten thousand"; Refers to the extremely short time and great changes; And "unpredictable" focuses on "unpredictable"; Of variety but not easy to grasp.

[ Example] The comrades of this alpine weather station have made long-term observations on the local climate. Gradually mastered its changing law.

[ English translation] vary from minute to minute