他已经报名参加志愿者。

He has applied to join the volunteer.

youdao

我报名参加一个很重要的座谈会的志愿者。

I entered for volunteer for a very important meeting.

youdao

共有5千多名志愿者报名参加了今年的活动，但活动的实际参赛人数和所筹善款金额目前还没有得到确认。

Though more than 5, 000 people filled in applications to enter the 2006 event, the exact number of runners along with the total amount raised was not to be confirmed.

youdao