Спросила у знакомого австралийца.Оказывается, всё просто Whoever wrote that phrase could have easily have written "Love the old as well as the new cards"Целиком его ответ такой:Well, what an interesting question Two strange words... one from the railway, and one from the mines "Retro" is an abbreviation (shortening) of the word "retrograde", which is a shortening of the word "retrogradient", which isn't used nowadays... this word (retrogradient) comes to us from the railways... it literally means "reverse gradient", or "going downhill backwards" "Retro" is used nowadays to mean "from the past", so a "retro" postcard would be an old-fashioned postcard (made today, but made in the style of postcards from the past)... "Cutting-edge" comes to us from the mines... "Where is Tatiana"? someone asks Geoffrey in the coal mine, "Is she working above ground today"?"No, she is at the cutting edge" says Geoffrey, because Tatiana is where the action is, right at the coalface, where everything is happening... So, "cutting edge" is used nowadays to mean the most modern, the most fashionable, the latest, the most recent, the best of the best, right at the cutting edge of technology or art or fashion...Whoever wrote that phrase could have easily have written "Love the old as well as the new cards"