广义相对论已经通过了我们所有的测试,甚至在超大质量黑洞附近也是如此。
The future of mining lies in sustainability and technology.
When you're different, sometimes you don't see the millions of people who accept you for what you are. All you notice is the person who doesn't.
国家是理性的行为体,它们寻求最大化相对权力,以确保在竞争性的国际体系中生存。