1. The expiration date on this yogurt was November 20. 这酸奶的有效期到11月20日。
2. But soda past its expiration date goes flat and loses much of its taste. 但是过期的苏打水跑气，味道也会大打折扣。
3. Then he proceeded to recite his card number and expiration date before signing off. 接着他开始背诵他的卡号和有效期，然后才签字。
4. One major cause of this problem is the confusion over food expiration labels, which are currently not regulated by the government. 造成问题的一大原因是食物过期标签混乱，目前不受政府监管。
5. Period may be extended upon expiration (through agreement). 通过协议可以延长期限。
