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pre-existing

pre-existing, preexisting /ˌpriːɪɡˈzɪstɪŋ◂/ adjectiveadj [only before noun]  
formalEXIST existing before a particular time or event 先于存在的
 Inform your doctor of any pre-existing medical condition.
既往病史要告知医生。
Examples from the Corpus
pre-existing
Before a time or event:before, first, early...

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