not know the first thing about have not the slightest idea about (something) 对（某事物）一无所知。 not know the first thing about对(某事)一窍不通： He boasted himself to be an expert in technology，but as a matter of fact，he did not know the first thing about technological affairs.他吹嘘自己是一个技术专家，但是实际上他对技术事务一窍不通。 |