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TOEFL BNC: 14319 COCA: 14552

to officially stop a document, ticket, law, etc. being legally or officially acceptable使无效;使作废

to prove that an opinion, argument, etc. is wrong证明(观点、论点等)错误

TOEFL BNC: 14319 COCA: 14552
TOEFL BNC: 14319 COCA: 14552
invalidate verb
cancel (invalidate a guarantee) disprove (Evidence invalidates his version of events.)
TOEFL BNC: 14319 COCA: 14552

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