单靠技术无法解决饥饿问题,必须与公平获取和教育相结合。
There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.
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。
真正的创新不是颠覆,而是解决实际问题。