When the new law was proposed, we began hearing arguments from both the 'pros' and the cons. [=from the people who supported it and the people who opposed it]
Congress weighed the 'pros and cons' of the new tax plan. [=the arguments for and against the new tax plan]
The governor has taken a 'pro-choice' position. = The governor is 'pro-choice'.
(..) me, and, when he left me, I had nothing. I was ten years old. You're very frank, Clarice. I think it would be quite something to know you in private life. Suid pro quo, Doctor. So tell me about Miss West Virginia. Was she a large girl? - Yes. - Big through the hips? Roomy? - They all were. (..)1991 The Silence of the Lambs
(..) There's a very nice beach. - Terns nest there. There's beautiful... - Terns? If I help you, Clarice, it will be "turns" with us too. Suid pro quo. I tell you things, you tell me things. Not about this case, though. About yourself. Suid pro quo. Yes or no? Yes or no, Clarice? (..)1991 The Silence of the Lambs