| 单词 | quadratic mean |
| 释义 | mean3 /mēn/adjective
ORIGIN: OFr meien (Fr moyen), from L mediānus, from medius middle means singular noun or plural noun
meanˈtime or meanˈwhile noun The intervening time adverb
mean free path noun The average distance travelled by a molecule, atom, etc, between collisions mean lethal dose noun (radiology) The single dose of whole body irradiation which will cause death, within a certain period, to 50% of those receiving it (abbrev MLD) mean sea level see sea level under sea means test noun The test of private resources, determining or limiting a claim to a concession or allowance meansˈ-test transitive verb mean sun noun An imaginary sun moving uniformly in the equator, its position giving mean time or mean solar time (coinciding with true sun time four times a year) meanˈ-tone noun (music) An interval of mean value between a major and a minor second, formerly used in a system of temperament a means to an end A method designed solely to achieve a goal, without regard for the value of the method itself arithmetic (or arithmetical) mean The sum of a number of quantities divided by their number by all means Certainly by any means In any way by means (Spenser) Because by means of With the help or use of by no means or not by any means Certainly not geometric (or geometrical) mean The nth root of the product of n quantities golden mean
harmonic mean The reciprocal of the arithmetical mean of the reciprocals of two quantities in the mean (Spenser) In the meantime quadratic mean The square root of the arithmetical mean of the squares of the given quantities |
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