To retrofit a machine, a building, or a piece of equipment is to go back to something already in use and put newer, better parts into it, instead of throwing the whole thing away. The word lives in workshops, factories, cars, and talk about old buildings — adding seat belts to an old bus, or better windows to an old school.

To retrofit retrofit一台 a machine, a building, or a piece of equipment機器、一棟建築，或一件設備 is to go back to something already in use是回頭去改造已經在使用的東西 and而 put newer, better parts into it把更新、更好的零件裝進去, instead of throwing the whole thing away而不是把整個東西丟掉. The word這個字 lives in出現在 workshops, factories, cars, and talk about old buildings工廠、汽車，還有講老建築的話題裡 — adding seat belts to an old bus像是幫一輛舊巴士加裝安全帶, or better windows to an old school或幫一間舊學校裝更好的窗戶.

You will also meet the noun: a retrofit is that later upgrade itself. It is a practical, slightly technical word.

You你 will also meet也會遇到 the noun名詞用法: a retrofit retrofit就是 is that later upgrade itself後來加裝的那次升級本身. It它 is a practical, slightly technical word是個實用、有點技術性的字.

Though actually, it is not the same as a repair: a repair puts back what was broken; a retrofit adds something the thing did not have when it was first made, or swaps in a better kind of part. The “retro” here means “back to the old thing,” not “old-fashioned style.”

Though actually不過事實上, it它並 is not the same as a repair跟repair（修理）不一樣: a repair repair是 puts back what was broken把壞掉的東西修回原樣; a retrofit retrofit則是 adds something the thing did not have when it was first made加裝原本製造時就沒有的東西, or swaps in a better kind of part或換上更好的一種零件. The "retro" here這裡的「retro」 means意思是 "back to the old thing,"「回到舊東西那裡」, not "old-fashioned style."而不是「復古風格」.