Existential risk -- the second big problem. 存在风险——第二个重大问题。 Existential risk is a threat to human survival, or to the long-term potential of our species. 存在风险是对人类生存，或对整个人类种群的长远潜能的一种威胁。 Now, why do I sa
President's Radio Address THE PRESIDENT: Good morning. This weekend, families across America are coming together to celebrate Easter. This is the most important holiday in the Christian faith. And du
I remember the first time I saw Robert De Niro up on screen. I was 13 years old and despite what I learned career day. I discovered that acting was in fact a profession. My father and I went to see Mi
