一级理论和二级理论的区别

He was already imagining that in the future he would wave his Tianyun wings and walk in the vast starry sky, and suddenly encounter an endless tide of starry sky beasts. Then he waved his hand, and more terrifying Explosive Bees swarmed up. All he had to do was stand aside and watch these beasts turn into ashes among the Explosive Bees....