统治者的首要职责是保护社会免受其他独立社会的暴力和侵略，只有通过军事力量才能实现这一职责。
The first duty of the sovereign， that of protecting the society from the violence and invasion of other independent societies， can be performed only by means of a military force.
在机器学习中，偏差和方差之间的权衡对于实现良好的泛化至关重要。
Once you understand how to write a program get someone else to write it.
我们都在互相陪伴着回家。
The greatest glory in living lies not in never falling, but in rising every time we fall.