Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.
The future of mining lies in sustainability and technology.
质量从来不是偶然的;它始终是智慧努力的结果。
行义事不能进行时,不要责怪道义。
在家不会接待客人,出去后才知道这个问题的重要性。
孔子说:“老好人是败坏道德的人。”