Well, actually there's evidence now looking at different mouse strains, so these are mice with different genetic backgrounds, that actually showing calorie restriction doesn't work quite as well in all of them.

实际上现在有证据正在研究不同的小鼠品系，所以这些是具有不同遗传背景的小鼠，但实际上它们显示卡路里限制在所有这些小鼠中并没有那么好的效果。