要理解现在，必须挖掘过去。
To understand the present, we must dig into the past.
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.
The coal industry must deepen supply-side structural reforms and improve supply quality.
Strategic planning is not about predicting the future, but about preparing for it.
对待侮辱最好的回应就是「你可能是对的」。而事实经常确是如此。