translation.en: Gorillas and orangutans, for instance, afford about 30 billion neurons by spending eight and a half hours per day eating, and that seems to be about as much as they can do.
translation.zh: 大猩猩和红毛猩猩，例如， 能夠负担约 300 亿个神经元 它们每天花八个半小时吃饭， 这似乎是它们所能做的一切。