An introvert is a quiet, shy person who finds it difficult to talk to people. 内向的人
noun [抽象名词]内向的人
If you're not an introvert yourself, you are surely raising, managing, married to, or coupled with one. 如果你自己不是一个内向的人,你肯定在养育、管理一个内向的人,或者和一个内向的人结了婚或在约会。
adjective [原级]内向的
I have a problem. I'm an introvert. 我是一个内向的人,这对我来说是一个问题。