certificationn.
英 ,sɜːtɪfɪ'keɪʃən | 美 ,sɝtɪfɪ'keʃən
中文n. 证明，保证；检定
词根词源
certification (n.)early 15c., "notification;" mid-15c., "demonstration, proof," from Medieval Latin certificationem (nominative certificatio), noun of action from past participle stem of Late Latin certificare (see certify). Meaning "act of providing with a legal certificate" is from 1881.
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