We'd be on dangerous ground if we asked about race or religion.

我们要是问到种族或宗教问题，就很可能会冒犯人。

《牛津词典》

You're on dangerous ground when you criticize his daughter, ie because he will react angrily.

你批评他的女儿就要惹出是非了（因为他生气）。

youdao

If you've never met the person that you're communicating with online, you could be on dangerous ground!

如果你从来没有碰到过你正在线与其交流的那个人，那么你可能处于危险的境地。

youdao

The Democrats met just three blocks from the White House, but with half a meter of snow on the ground from a winter storm, the trip became dangerous.

VOA: standard.2010.02.06

"The situation currently on the ground is quite dangerous,".

VOA: standard.2009.04.09

Following TV work, which included episodes of Casualty and Heartbeat, his final on-screen role was in a made-for-TV film, On Dangerous Ground, with Hollywood star Rob Lowe.

BBC: Onedin Line actor Peter Gilmore dies aged 81

Discarding the Nicolau award places USAPA on dangerous ground.

FORBES: Judge Says US Airways and Pilots Can Negotiate, but Risk Seniority Lawsuit

De Silva says he is sure the propaganda was "reaching loyalist paramilitaries" and MI5 began to become concerned that this was treading on "dangerous ground".

BBC: De Silva report on Finucane case turns spotlight on MI5