她打手势要他来加入他们的活动。

She beckoned him to come and join them.

《牛津词典》

每次看到其他孩子在外面玩得很开心，刘艳芝就很想加入他们。

Every time she saw other children play happily outside, Liu Yanzhi really wanted to join them.

youdao

越来越多的公司正在加入他们。

And more and more companies are joining them.

youdao

you know, you get in touch with someone in that club, and they are going to add you in the mailing list.

你可以和俱乐部中的人取得联系，然后他们就把你加入联系人名单。

社团小组信息 - SpeakingMax英语口语达人

They took advantage of their opportunity, seized their opportunity and imposed their own form upon it.

他们抓住机会，紧握他们的机会,并强加入他们自己的形式。

耶鲁公开课 - 政治哲学导论课程节选

And I will try and remember not to include Jude and Wes in the classroom discussions, but you should be aware that they're there.

我会尽量注意,不要让他们两位加入课堂讨论的,但是你们也要注意到他们的存在

耶鲁公开课 - 博弈论课程节选