Mathematics is a language that allows us to describe the indescribable.
"Love is not a victory march, it's a cold and it's a broken hallelujah."
保卫国家政权,是那些君主和臣子等享受俸禄的人谋划的事;保卫整个天下,即使是地位低微的普通百姓也有责任参与。