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run-up (n.)
[run-up 词源字典]
1834, "an act of running upward," from verbal phrase, from
run
(v.) +
up
(adv.). Extended sense "period of time or sequence of events proceeding some important event" is from 1966.
[run-up etymology, run-up origin, 英语词源]
[run-up 词源字典]