日不移晷

Explanation: Analogy only moment, very quickly. 　　Usage: The main predicate; as the predicate attribute; metaphor is only the moment, very quickly 　　Source: Han Ban "on the Biography of Wang Mang Han": "people do not also heel, Japan inalienable sundial, Huo Ran four shall be, rather more towards." Thesaurus:  before long, (as) quick as wink, streamer evanescence, curl up one's leg and wait, Grabbing amongst, A fillip are