about 500 of the more than 34000 officials whose accounts were audited last year

去年账户被审计过的超过34000名官员中的大约500人。

在超过34000官员中的大约500人去年被查了账

about 500 of the more than 34000 officials whose accounts were audited last year
去年在超过34000名官员中，有大约500名被查了账。

去年三万四千多名官员中约五百名官员的帐户接受了审计。