not know B from a buffalo

例句：

1. 1.I've never been to New York City before, so I have no idea what it's like.
   我以前从未去过纽约市，所以我不知道它是什么样的。
2. 2.She was clueless about the new technology until she saw the demonstration.
   她对新技术一无所知，直到她看到演示。
3. 3. The company had no idea about the market trends until they conducted their own research.
   该公司对市场趋势一无所知，直到他们进行了自己的研究。