历史学家行走在事实与想象的钢丝上。
我认为生活中最重要的事情就是让自己快乐,也让别人快乐。
Inside us there is something that has no name, that something is what we are.
燃气发动机是所有热机中最完美的,因为它结合了蒸汽机和内燃机的优点。
The state is the most important institution in human history.