在观察性研究中，我们常常不得不依赖于无法直接检验的假设。
La música es el lenguaje universal que nos une a todos.
The best ideas often come from those closest to the problem.
The past is never dead. It's not even past.
用英语，每个词都可以动词。在我们的编程语言中会是这样吗？
Every story is a mirror that reflects not just the author, but the reader as well.