历史学家行走在事实与想象的钢丝上。

我干涉得越少，画作就变得越好。

The ultimate situations - death, chance, guilt, and the uncertainty of the world - confront man with the reality of his existence.

Safety is not just a priority, it's a core value. Every employee should go home safely every day.

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。