（图片仅供参考）
‘Use by’ dates are related to food safety. They are used on foods that are highly perishable from a microbiological perspective and could pose an immediate danger to human health after a short period. In contrast, ‘best before’ or ‘best if used by’ dates relate to food quality, indicating when the product will be at its peak flavor, texture, and nutritional value.
The distinction between these two types of date labels is a critical component of modern food regulation and consumer information. ‘Use by’ dates are a definitive deadline for consumption due to the potential for rapid growth of harmful pathogens like Listeria monocytogenes or Salmonella in products such as fresh meat, fish, and prepared salads. Consuming these items past the ‘use by’ date is considered unsafe, regardless of their appearance or smell.
On the other hand, ‘best before’ dates are a manufacturer’s estimate of optimal quality. Products like canned goods, dried pasta, biscuits, and frozen foods are often safe to eat long after this date, although their sensory attributes might have diminished. Misinterpreting ‘best before’ as a safety deadline is a major contributor to household food waste. Consequently, public health organizations and governments actively campaign to educate consumers on this difference to simultaneously improve food safety practices and reduce the unnecessary disposal of perfectly edible food.
‘使用日期 ’与 ‘最佳食用日期 ’的比较
（如果日期未知或不相关，例如“流体力学”，则提供其显著出现的近似估计）
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