死者从未真正离去，他们只是改变了形态。
The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.
2016年：贝索斯致股东信《每天都要像创业的第一天那样》
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.