The judge said the punishment would serve as a warning to others.

法官说这种惩罚将起到杀一儆百的作用。

《牛津词典》

The following is what I found out, information and a warning to others.

接下来的就是我所发现的信息，并警告他人小心之。

youdao

The so-called" immediately start", is" execute one as a warning to others, to take Philippines.

所谓“立即开打”，就是“杀一儆百”，先拿菲律宾“开涮”。

youdao

The conviction of a trawlerman illegally fishing within Guernsey's 12-mile limit will act as a warning to others, according to the States.

BBC: Brixham registered beam trawler in St Peter Port Harbour

The relentless, pounding beat ruins the whole complexity of the song and serves as a warning to others that some classics are just uncoverable.

BBC: Garage Inc - Metallica

He immediately stopped talking after a magistrate judge and a representative from the U.S. Attorney's office entered the room and gave him his Miranda warning, according to a U.S. law enforcement official and others briefed on the interrogation.

NPR: Police: Boston Suspects Planned To Attack New York