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.
(..) By the powers, you're right. Where be Jack's pistol? Bring it forward. Seeing as there's two of us, a gentleman would give us a pair of pistols. It'll be one pistol as before, You can be the gentleman and shoot the lady and starve to death yourself. That's the second time (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl