If someone is innocent, they have no experience or knowledge of the more complex or unpleasant aspects of life.
阅历浅的; 天真的
An innocent is someone who is innocent.
阅历浅的人; 天真的人 • She had always regarded Greg as a hopeless innocent where women were concerned. 她过去一直认为格雷格在关于女人方面是一个不可救药的无知者。