translation.en: I've really tried to solve some big problems: counterterrorism, nuclear terrorism, and health care and diagnosing and treating cancer, but I started thinking about all these problems, and I realized that the really biggest problem we face, what all these other problems come down to, is energy, is electricity, the flow of electrons.
translation.zh: 我一直在尝试解决一些大问题： 比如反恐，核恐怖活动， 还有医疗保健，癌症的诊断和治疗， 然而当我开始思考这些问题， 我意识到，我们面临的最大问题， 也是所有其他问题的根源， 是能源，电力，电子的流动。