Tom can go shopping, and nobody knows him.

汤姆可以去购物了，并没人知道他。

youdao

Nobody knows much about him; he keeps himself very much to himself.

谁对他都不太了解，因为他很少和人交往。

《牛津词典》

Nobody knows his sorrow, nobody can understand him.

没有人知道他的伤痛，没有人懂他。

youdao

Nobody has spoken to him and nobody knows what has happened.

BBC: Papac targets victory over Unirea

There are several stories about him that nobody knows or didn't know until I wrote the book, which is saying he was something of a war hero.

NPR: Electronics Pioneer William Shockley's Legacy

Wales number eight Andy Powell signing for Wasps was a strange one - nobody expected that - but Shaun Edwards knows him really well from the Wales set-up and Powell will certainly know what he's signed up to.

BBC: Jeremy Guscott's Premiership preview