今天突然之间想去看看自己的美联航什么时候过期，结果发现：
Great travel memories never expire, and now, miles don't either. We're excited to share that there's no expiration date on the miles you've earned with us.
美妙的旅行记忆永远不会过期，现在，您的里程也是如此。 我们非常高兴地告知您，您在搭乘美联航航班时赢取的里程将永远不会过期。
是学习达美了吗？什么时候开始的啊？
