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To understand mathematics is to understand the fabric of reality.
没有“悲哀”提供平衡,“愉快”一词就会失去意义。
"A nation that destroys its soils destroys itself. Forests are the lungs of our land, purifying the air and giving fresh strength to our people."
行为主义者放在自己面前的规则或衡量标准总是:我能否用"刺激和反应"来描述我所看到的这一行为?
Nothing spoils a romance so much as sense of humour in the woman—or the want of it in the man.
Quality is remembered long after the price is forgotten.