keep aheadvi phrasalphrasal verb, intransitive: Verb with adverb(s) or preposition(s), having special meaning and not taking direct object--for example, "make up" [=reconcile]: "After they fought, they made up."
figurative (be first, outdo others)
领先 lǐng xiān
保持领先地位
keep ahead of [sth]vi phrasal + prep
figurative (manage in advance)
预先处理，提前处理
提前完成
Jill is trying to keep ahead of the weeds in her garden.