不懂用英语是ignorant of。
ignorant of
词义：动词：不知道；不懂。
固定搭配：be utterly ignorant of 一无所知 ; 完全无知 ; 一窍不通。
例句：
1、Don't I know how old she is; eight years old and ignorant of everything. 我不知道她多大了吗？八岁，什么都不懂。
2、That doesn't mean the market has any right to be ignorant of events that are barreling down the pike toward it. 那并不意味着市场有权对纷至沓来的重大事件一无所知。
无限幻想海浪
