- 挺身而出 [tǐng shēn ér chū]
- step forward bravely [boldly]; bell the cat; bolster oneself up; come forward courageously; come out boldly; stand up and volunteer to help; throw oneself forward; thrust oneself forward to face a challenge:
He got up in front of the huge crowd and made a moving and fiery speech. 他挺身而出，在大庭广众面前，慷慨激昂地讲了一通。
At this critical moment, several of the men stepped forward.
Police have appealed for witnesses to come forward.
Everybody made suggestions but on one actually offered to bell the cat.