Promo

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google

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1960s: abbreviation of promotion.


Ety img promo.png

wiktionary

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etymonline

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promo (n.)

"a promotional advertisement," 1958 (in Billboard magazine headlines), shortening of promotion in the sense "advertising, publicity."

取自“https://www.bigphysics.org/index.php?title=Promo&oldid=48469”