The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
抽象的目的不是含糊不清，而是创建一个新的语义层次，在这个层次上可以绝对精确。
The past is a map, showing us where we have been.
In computing, the mean time to failure keeps getting shorter.
Who hears music, feels his solitude peopled at once.
这些年来我学到的是市场总是对的。