be utterly ignorant of;an absolute blockhead;be a complete ignoramus;can't see sense ;

He knew virtually nothing about music but he could smell a hit.
他对音乐几乎一窍不通,却预感到它将会大受欢迎。
来源:《柯林斯高阶英汉双解学习词典》I came into adult life clueless about a lot of things that most people take for granted.
我已成年,却对许多大部分人认为理所当然的事情一窍不通。
来源:《柯林斯高阶英汉双解学习词典》I've always worked on the basis that if I don't know anything technical I shan't be any worse off.
我一贯认为,即便我对技术一窍不通,我也不会比现在更穷困潦倒。
来源:《柯林斯高阶英汉双解学习词典》
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