一无所知
(一無所知)to know nothing about
Example Sentences
在没有深入做过市场调查之前，他对这个行业的发展现状可谓一无所知。
zài méi yǒu shēn rù zuò guò shì chǎng diào chá zhī qián, tā duì zhè ge háng yè de fā zhǎn xiàn zhuàng kě wèi yī wú suǒ zhī.
Before conducting in-depth market research, he knew nothing about the current development status of this industry.
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