front-runnern.
英 'frʌnt,rʌnə | 美
中文n. 竞争中的领先者；赛跑中跑在前头的人
词根词源
front-runner (n.)also frontrunner, of political candidates, 1908, American English, a metaphor from horse racing (where it is used by 1901 of a horse that runs best while in the lead).
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