参与者

例句：

1. 1. The team needs more participants to finish the project on time.
   这个团队需要更多的参与者才能按时完成这个项目。
2. 2.She is a great participant in our community activities.
   她是我们社区活动的杰出参与者。
3. 3. Participants were asked to sign a consent form before the meeting began.
   在会议开始前，参与者被要求签署一份同意书。