The sites and logistics committee should start new study circles for late registrants, rather than allow them to join groups already in progress.

协作平台和后勤委员会应为后期加入的参与者开设新的研究小组，而不是让他们加入已在进行中的团体。

youdao

The question of what age is appropriate for kids to join social-networking sites has been debated by privacy advocates and parental groups for years.

关于多大的孩子才适合加入在线社交网络的问题，隐私专员和父母们争论了很多年。

youdao

Talk to people working in the field and join networking groups on sites like LinkedIn.com, for example.

比如说，你可以和业内人士多加接触，参加网络社交群体如LinkedIn.com等等。

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But knowing which social-networking sites to join and how to take advantage of them can be daunting for a rookie entrepreneur.

WSJ: Make Social Networks Work for Your Start-Up