Black holes are not just cosmic vacuums; they are the ultimate laboratories for testing the limits of our physical theories.
黑洞不仅仅是宇宙的真空吸尘器；它们是测试我们物理理论极限的终极实验室。
我认为最好的学习方法就是实践。
We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love... and then we return home.
每本书都是作者和读者之间的对话。
The existence of the natural world is the same kind of fact as the existence of any proposition.
