Because of the Earth tilting on its axis and those catastrophic climate shifts, we had to figure out how to find better food, and we had to learn -- there's Lucy; that's how we all began -- we had to learn how to crack open animal bones, use tools to do that, to feed on the marrow, to grow our brains more.
因为地球倾斜的地轴 和灾难性的气候变化 我们得弄清楚如何找到更好的食物 我们得学习－这是露西，我们的起源－ 我们得学习如何使用工具来 砸开动物的骨骼，以食用骨髓 来是我们的大脑得到发育