生产日期有两种缩写方式：
1、PD， 即production date。
2、MFG，即manufacturing date。
有效期截止日期缩写"Exp".。也就是有效限期，失效日期，完整写是expiring date。
例句：
1、Models showing a manufacturing date in2009, written in red ink, are not included in this recall.
产品型号代表生产日期在2009年，红字印刷，并不包括此次的召回产品。
2、If you need to know the manufacturing date, I can find out for you based on the Serial Number.
如果您想知道生产日期，我可以通过序列号帮您找到。
3、Pay attention to the production date and the storing way.
注意生产日期和储存方式。
4、The main information for consumers to judge the food safety quality of packed food was expiring date.
食品保质期是消费者辨别定型包装食品安全质量的主要信息.
5、Result: There were great difference in polysaccharide content in ganoderma capsule products from different manufacturers with an average expiring date of 1.12 years.
结果：不同厂家及批号的灵芝胶囊中多糖含量有较大差异，其胶囊的有效期为1.12年。
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