I know nothing about this river, neither how long, how wide nor how deep it is.
我一点也不了解这条河,不知道它有多长,多宽或多深。
Except for what I read in the newspaper, I know nothing about this accident.
除了报纸上所读到的以外,我对这次事故一无所知。
I know nothing about this person.
我对这个人一无所知。
I afraid I know nothing about this computer.
恐怕我对计算机一窍不通。