I have to report this to the authorities.

我得向官方报告此事。

《牛津词典》

When the noise remains going on, you should report it to local authorities, or even the police department, when it is really necessary.

如若噪音一直存在，你应该向当地权力机关举报，甚至在必要时报警。

youdao

He eventually found a job, but without the help of ITS, and received a partial refund after threatening to report the company to the authorities.

他最终找到一份工作，但不是在ITS的帮助下，并且说在要向相关部门报告后得到了部分退款。

youdao

Because many immigrants are from countries where authorities can be trusted, they're often afraid to report crimes in the U.S.

VOA: standard.2010.07.22

"Often time terrorism is beaten not by the government but by regular people who have the courage to report something unusual to the authorities,"

VOA: standard.2009.09.21

Goldstone said the mission is recommending the Security Council require Israel and the Palestinian authorities to undertake investigations into the crimes committed during the war and to report back in six-months.

VOA: standard.2009.09.29

First, it will become compulsory for sex offenders to report to the authorities before travelling abroad for even one day - the limit is currently three days.

BBC: Q&A: Sex offenders register

The girl's mother also faces charges for failing to report the abuse to the authorities.

BBC: Maldives girl to get 100 lashes for pre-marital sex

Some European countries, he points out, now have rules that make companies who suffer big losses of customer data to report these to the authorities.

ECONOMIST: Legal confusion on internet privacy