However, according to the record, he was guilty of computer crimes in the past.

但是，根据他的犯罪记录，他过去曾因为电脑犯罪而获刑。

It's easy for computer crimes to go undetected if no one checks up on what the computer is doing.

如果没人检验计算机正在做什么，这种计算机犯罪是很难被察觉到的。