Two legs are better than one leg, and one leg is better than no leg. "Four-legged" refers to domestic animals, such as pigs, cows, horses and sheep, excluding amphibians and reptiles such as turtles.

"Two legs" refers to birds, such as chickens, ducks, geese, and of course ostriches, turkeys and birds.

"One foot" refers to various edible fungi. Such as: mushrooms, fungus, etc.

"Legless" refers to all kinds of fish! This theory is mainly classified according to the standard that low fat "high quality and high protein" and the nutritional content and proportion of trace elements are beneficial to human body. The fewer legs, the better for the human body. ) Most animals' bodies are radially symmetrical or uniaxial ... while radially symmetrical animals are inferior ... Without the concept of legs ... animals with legs are basically uniaxial ... that is, there are no odd legs ... (except for mutant species ...)