单双循环的公式简介：He also took the long sword and looked at it, and at the same time, countless secret recipes came to his mind. Since the steel had met the requirements, he would be able to study artillery and guns with ease.
He also took the long sword and looked at it, and at the same time, countless secret recipes came to his mind. Since the steel had met the requirements, he would be able to study artillery and guns with ease.
