shelf life
商品或物品的保质期限
口语·讨论有效期
英文释义
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.
典故来源
原指食品在货架上的保存期限，后引申为任何事物（如想法、产品）的有效或相关时间。