participant
n. 参加者，参与者
adj. 参与的
复数 participants
例句
He has been an active participant in the discussion.
他一直积极参与这次讨论。
《牛津词典》
As an active participant in various volunteer work, I have a lot of experience in serving others.
作为一个积极参与各种志愿活动的人，我在服务他人方面有很多经验。
In the past few years, Math Counts added two new middle school programs to try to diversify its participant pool.
在过去的几年里，Math Counts 增加了两个新的中学项目，试图使其参与者多样化。
