posterity /pɒˈstɛrɪtɪ/

• 1. 

  N-UNCOUNT You can refer to everyone who will be alive in the future as posterity. 子孙后代 [正式]

  例：

  A photographer recorded the scene on video for posterity.

  一位摄影师为子孙后代摄下了这个场面。