used-byBNC²³⁶²¹³⁺¹ 例句 The “ use-by” or“ best if used-by” date indicates the last day that the item is at its best quality as far as taste, texture, appearance, odor, and nutritional value. The decline after that is gradual. “有效使用期”或“最好于该日期前使用”表示的是该产品在这个日期前，从口感、质地、外观、气味和营养价值等各方面保质着最佳质量，过期之后质量就会逐渐下降。 yeeyan