To define an expression is, paradoxically speaking, to explain how to get along without it. To define is to eliminate.

To define an expression is, paradoxically speaking, to explain how to get along without it. To define is to eliminate.

自相矛盾地说，定义一个表达就是解释如何在没有它的情况下生活。定义就是消除。

-- Willard Van Orman Quine 威拉德·冯·奥曼·蒯因