used to convey the idea that the chief or only aim of a work of art is the self-expression of the individual artist who creates it
为艺术而艺术，艺术至上主义
(proverb)there is so much knowledge to acquire that a lifetime is not sufficient
(谚)人生有限，学问无边
the strategy, tactics, and techniques of combat
战略、战术及战斗技巧；兵法