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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。
"In observational studies, we often have to rely on assumptions that are not directly testable."
The law isn't justice. It's a very imperfect mechanism. If you press exactly the right buttons and are also lucky, justice may show up in the answer.
When a professor insists computer science is X but not Y, have compassion for his graduate students.
The past is never dead. It's not even past.