The reason why he's reprogramming that animal to have more wings is because when you used to play with lizards as a little child, and you picked up the lizard, sometimes the tail fell off, but it regrew.
他从事这项研究 是因为当我们小时候玩蟋蟀 有时候抓住蟋蟀时它的尾巴会掉，但还能再长出来