By used books. They have the same words as the new ones. Also libraries.
理解一个国家的首要条件是去闻闻它的气味。
数学真理是普遍而永恒的。
人们改变了,却忘了告诉对方。
The elements of consciousness are to be classified according to their properties.
建筑不是关于形式,而是关于生活。