过去是一个外国;他们在那里做事的方式不同。
"The past is a foreign country; they do things differently there."
To be human is to be in the world, and to be in the world is to be in time.
很可能还会发明出其他几种辅助视觉的工具,它们超越现有工具的程度,就像现有工具超越肉眼一样。