in·ex·pe·ri·ence /ˌɪnɪkˈspɪriən(t)s/
無經驗,不熟練,未熟
In·ex·pe·ri·ence n. Absence or lack of experience; lack of personal and experimental knowledge; as, the inexperience of youth.
Failings which are incident to youth and inexperience. --Dryden.
Prejudice and self-sufficiency naturally proceed from inexperience of the world, and ignorance of mankind. --Addison.
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inexperience
n : lack of experience and the knowledge and understanding
derived from experience [ant: experience]