粮食安全是国家安全的基石，我们必须牢牢把握在自己手中。

The galactic center is a unique natural experiment in strong gravity.

Nowadays, particularly in the United States, if you meet someone at the bottom of society, they may unkindly be described as a "loser." There's a real difference between an unfortunate and a loser, and that shows 400 years of evolution in society and our belief in who is responsible for our lives. It's no longer the gods, it's us. We're in the driving seat.

有时保持理智的唯一方法就是偶尔发疯。