他们参加了一个宗教团体，献身于祈祷和做善事。

They had joined a religious order and dedicated their lives to prayer and good works.

《柯林斯英汉双解大词典》

他们参加运动、爬树、玩捉人游戏等。

They participate in sports, climb trees, play tag, etc.

youdao

他们参加棒球俱乐部。

They join the baseball club.

youdao

And in fact I don't remember talking very much about the war though they had been in the war.

不过，说实话，我们并不经常,谈战争，虽然他们参加过二战。

普林斯顿公开课 - 人性课程节选

You know, I couldn't invite a hundred people and buy them all shoes, you know, to my daughter's birthday party, so

我不会请一百个人来参加我女儿的生日聚会，还给他们每人买双鞋，所以，

富家孩子的生日 - SpeakingMax英语口语达人

So, when they ask you questions about which person should be on the quiz show, people say the more competent person.

因此，当他们问你,觉得谁应该去参加这个智力竞猜节目，你们会说更有能力的人应该去。

耶鲁公开课 - 心理学导论课程节选