世界不是一个愿望实现的工厂。
The success of a learning algorithm depends on its ability to balance between fitting the data and avoiding overfitting.
"The world is full of obvious things which nobody by any chance ever observes."
翻译：君子要多了解古人的言论和行为，以蓄养自己的德行。
多疑的人是不会因此而满足的；他们往往不是因为有了什么理由而嫉妒，只是为了嫉妒而嫉妒，那是一个凭空而来、自生自长的怪物。