Not know beans about
一无所知
Beans是“豆子”,not know beans about是什么意思呢?请看对话:
A: What do you suggest I buy my dad for his birthday?
B: How about an iPad? He would be able to play chess on it and chat with you via Facetime.
A: Perhaps no. Last time I bought him a computer, he said: "Return it please. I don't know beans about computers - I've never even used one."
B: Then you should spend some time teaching him to use the gadgets.
Note: The idiom means to "know nothing about something." We also say to "spill the beans," which means to "reveal information."
One possible origin of the "beans" idioms is a game that was played at rural fairs in America. In this game, contestants would guess the number of beans in a jar, where the number of beans was the key information.
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