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抽象允许一种自由,而具象有时无法做到。
Abstraction allows for a kind of freedom that representation sometimes doesn't.
释义:水一旦泼出去,就收不回来,后悔也来不及。  
The dead are more faithful than the living. They do not change.
在这个行业里,如果你很优秀,十次中你会对六次。你永远不会十次中对九次。
The beauty of mathematics is that it is a language that can describe the universe in a way that nothing else can.