Exchange groups are supposed to provide a contact person, or liaison, to help students in case they have any problems.

交换生组织为交换生提供联系人或联系方式，以在必要时帮助他们。

youdao

She proposed new ways of teaching, including holding discussion groups where students exchange ideas.

VOA: special.2010.06.27

Fairtrade USA left Fairtrade International in 2011, and other groups such as Equal Exchange have expanded consumer options for more fairly traded products.

FORBES: Are Consumers Growing Weary of 'Eco-Labels?'

The prince's Kingdom Holding Company, whose shares are traded on the Saudi stock exchange, owns stakes in hotel groups including Four Seasons and Fairmont Raffles and is a part-owner of the Savoy Hotel in London.

BBC: Forbes list understates my wealth, Saudi prince says

Individually and through trade groups and the American Legislative Exchange Council (ALEC), the industry is bent on shutting down existing publicly-owned broadband systems and blocking the development of new ones.

FORBES: Why Communities Should Decide What Telecom Networks They Have