Police have appealed for witnesses to come forward.

警方呼吁证人挺身而出。

《牛津词典》

Police have asked witnesses of the accident to come forward.

警方呼吁事故的目击者出来提供线索。

《牛津词典》

The recent survey asked victims why they chose not to come forward with their crimes.

最近的一个调查询问了受害者为什么他们不选择和犯罪分子斗争到底。

youdao

"We are encouraging people who have gone to the VCTs and have known their status - because that fear has been removed - to come forward now to us and give us blood."

VOA: standard.2010.06.04

So, I could ask any of you who have the courage to come forward and fight in my phalanx? Nobody?

所以,我斗胆请问,在座哪位有胆量上来,为我的方阵效力,没人吗

耶鲁公开课 - 古希腊历史简介课程节选

He's got to come forward and take the danger and take the blows and close the line.

他必须涉险向前,冒着枪林弹雨,去填补这一排的空缺

耶鲁公开课 - 古希腊历史简介课程节选

Brigadier Mulaudzi said police wanted alleged victims to come forward to help with investigations.

BBC: From the section Africa

This in turn means the deadline will be August for interested community groups to come forward.

BBC: Old Minehead hospital to be sold by NHS Somerset

Officers have renewed their appeal for four people who may have vital information to come forward.

BBC: Brighton CCTV image