每日口說挑戰為什麼泡麵在獄中那麼有價值？ (Why ramen is so valuable in prison)

聽聽句子怎麼說

But once it's out of the official commissary, ramen's value is determined by an informal prison economy.

但一旦從福利社售出後，泡麵的價值就取決於監獄中私下的經濟及消費情況了。