Her sell-by date expired years ago, I want you to start grooming some new people.

她的黄金期几年前就过了，我希望你开始培养一些新的人。

As the international negotiations on climate change struggle to deliver a new and decisive agreement there are those wondering if big international treaties have exceeded their sell-by date.

正当关于气候变化的国家间的谈判正步履维艰地实现一个新的具有决定性意义的协议的时候很多人怀疑一个庞大的国际条约是否已经超出了它的销售期限。