The two organizations 'paired up' to educate the public about the threat of global warming.
I can't do everything at once—I've only got 'one pair of hands'. [=I am only one person]
To avoid competition, breeding/mating 'pairs' stay away from other male chimpanzees.
(..) Niente. Niente. Olaf ? Nothing. Sven ? Uh-oh. Two pair. l'm sorry, Fabrizio. ''Sorry'' ? You bet all the money ! l'm sorry. You're not gonna see your mom for a long time. Cos we're going to America ! (..)1997 Titanic