But before then, they were eating lots of fruits, leaves, flowers and roots, but it's believed that the addition of animal protein and the accompanying calories helped their early brains and bodies evolve and grow larger.
在那之前,他們吃很多水果、葉子、花、植物的根部,但大家相信,額外攝取動物蛋白和卡路里幫助人類的早期大腦和身體演化發展得更大。