Pr

来自Big Physics
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late 19th century: modern Latin, from German Praseodym, from Greek prasios ‘leek-green’ (because of its green salts) + German Didym ‘didymium’.


Ety img pr.png

wiktionary

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etymonline

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PR (n.)

also P.R.; 1942, abbreviation of public relations (see public (adj.) ).

取自“https://www.bigphysics.org/index.php?title=Pr&oldid=30687”