be past its sell-by date 过了保质期
sell by date 保质期 ; 保质日期
was past its sell-by date 过期
past its sell-by date 过期的 ; 过期
sell-by-date 销售限期 ; 出售截至日期
sell-by date 保质期 ; 最迟销售日期
past one's sell-by date 超过有效期限
These policies are way past their sell-by date.
这些政策早成老皇历了。
《牛津词典》
This milk is past its sell-by date.
这牛奶已经过了销售期限。
Supermarkets throw away food that is not sold before its sell-by date, while families throw away food that they can't finish eating.
超市会扔掉未在保质期前出售的食物，而家里则会扔掉吃不完的食物。
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