| 单词 | quantum |
| 释义 | quantum n. (pl. quanta) 1. Physics a a discrete quantity of energy proportional in magnitude to the frequency of radiation it represents. b an analogous discrete amount of any other physical quantity. 2. a a required or allowed amount. b a share or portion. Phrases and idioms quantum jump (or leap) 1. a sudden large increase or advance. 2. Physics an abrupt transition in an atom or molecule from one quantum state to another. quantum mechanics (or theory) Physics a system or theory using the assumption that energy exists in discrete units. Etymology: L, neut. of quantus how much |
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