估计问题的性质不同。在这里,我们不关心检验特定的假设,而是关心估计参数的值。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
我不会专注于我所面对的困难,我会专注于我的目标,并尽量忽略其他事情。
The voice is a divine instrument, and we must use it wisely.