babe in arms
还是个孩子的人
口语·形容某人非常幼稚或缺乏经验
英文释义
an extremely young or innocent person; someone who is inexperienced or naive
例句
Don't expect him to handle this complex task; he's a babe in arms in this field.
典故来源
字面指需要抱在怀里的婴儿，比喻缺乏经验或天真的人。