n. 从正反两方面(权衡利弊)

Pro \Pro\, adv.
For, on, or in behalf of, the affirmative side; -- in
contrast with {con}.

{Pro and con}, for and against, on the affirmative and on the
negative side; as, they debated the question pro and con;
-- formerly used also as a verb.

{Pros and cons}, the arguments or reasons on either side.