pro-and-con 词源(Etymology) - V5词源[英文版]

pro-and-con [pro-and-con 词源字典]: "To weigh the arguments for and against; to debate both sides of (a question or matter)", Late 17th cent. Probably partly from pro and con, and partly from pro + and + con.[pro-and-con etymology, pro-and-con origin, 英语词源]