草-食草昆虫-蜘蛛-青蛙-蛇-狐-鹰；草-食草昆虫-鸟-蛇-狐-鹰；草-兔-鼠-蛇-狐-鹰；草-兔-蛇-狐-鹰。很复杂的食物链啊
So naive this is so called chinese educdation really misery and unfortunately
