shelf life
商品或物品的保質期限
口語·討論有效期
英文釋義
the length of time that a product, idea, or plan is considered to be effective or relevant; the period during which something can be used or enjoyed
例句
That software update has a short shelf life; it'll be obsolete in a year.
典故來源
原指食品在貨架上的保存期限，后引申為任何事物（如想法、產品）的有效或相關時間。