Pleurez, doux yeux, pleurez sans trêve.

技术决策要平衡前瞻性与实用性。

If something is too hard, we move on to something else.What could be more simpler than that?

I am too intelligent, too demanding, and too resourceful for anyone to be able to take charge of me entirely. No one knows me or loves me completely. I have only myself.

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。