come forward

英 [kʌm ˈfɔːwəd]

美 [kʌm ˈfɔːrwərd]

自告奋勇; 主动提供（信息）

柯林斯词典

PHRASAL VERB 自告奋勇;主动提供(信息)
If someonecomes forward, they offer to do something or to give some information in response to a request for help.
1. A vital witness came forward to say that she saw Tanner wearing the boots.
  一位非常重要的证人站出来说她看见坦纳穿着那双靴子。

verb

make oneself visible
1. Young people should step to the fore and help their peers
Synonym:come to the forestep forwardstep upstep to the forecome out

Investigations have ground to a standstill because no witnesses have come forward.
调查陷入停滞，因为没有证人站出来。
Those who do not come forward should be hunted down
对于那些不肯自首的罪犯应予缉拿归案。
It is thanks to this committee that many new sponsors have come forward
又有许多赞助商找上门来，这要归功于这个委员会。
Please, come forward, whoever you are.
不论你是谁请你过来。
Gray and Hunter were the first to come forward.
格雷和亨特首先站了出来。
The police have appealed to anyone with information to come forward and talk to them.
警察呼吁所有知情的人来和他们谈谈。
We let them come forward and cross the hedge, then we blew them apart.
我们会让敌人前进越过树篱，然后把他们切开。
A vital witness came forward to say that she saw Tanner wearing the boots.
一位非常重要的证人站出来说她看见坦纳穿着那双靴子。
Later in this service, you will be invited to come forward to receive ashes on your forehead.
在崇拜之后，您将被邀请前来，我们将会用炉灰沾在您的额头上。
Faculty and Student Council representatives will come forward to wash each other's feet.
老师和学生会代表将会上前来彼此洗脚。