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have a shelf life of [time period]
This product has a shelf life of two years.
这种产品的保质期为两年。
保质期；保存期限
先理解核心含义，再看它在真实句子里的用法。
保质期；保存期限
The length of time a product, especially food, drink, or packaged material, remains in good condition and can be used or sold.
This product has a shelf life of two years.
这种产品的保质期为两年。
产品(尤指食品和药品)在变质或售出前的保存期限
The length of time a product (especially food and drugs) will last without deteriorating or without being sold.
包装材料在特定条件下存放且仍符合规定性能要求的最长时间
The maximum time a packaged material can be stored under specific conditions and still meet the performance requirements specified.
某事物流行或时尚的持续时间
The length of time that something is popular or fashionable.
The shelf life of fresh milk is typically about one week.
新鲜牛奶的保质期通常大约为一周。
Always check the shelf life before buying canned food.
购买罐头食品前一定要检查保质期。
Proper storage can extend the shelf life of many products.
适当的储存可以延长许多产品的保质期。
This product has a shelf life of two years.
这种产品的保质期为两年。
Do not consume food that is past its shelf life.
不要食用已过保质期的食品。
Fresh milk has a short shelf life.
鲜牛奶的保质期很短。
Not this
The shelf life of this milk is March 15.
Use this
The shelf life of this milk is two weeks.
“shelf life”指一个时间段（如两周），而不是具体日期（如3月15日），应使用一个时间段作为补语。
Not this
This product has a long life.
Use this
This product has a long shelf life.
谈论产品的保质期时，必须使用固定短语“shelf life”，而不是单独使用“life”。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.