The psychologist must describe, not explain.

因此，自爱是行动的必要原则。

Death is present every day, but we don't see it until it touches us directly.

不要害怕犯错误。如果你没有犯错误，你就没有足够努力。

我想知道我一生中看过多少人，却从未真正看见过他们。

The proletarian movement is the self-conscious, independent movement of the immense majority, in the interest of the immense majority.

对于系统，翻版的模拟是在控制图中添加一个创建循环的边，而不仅仅是一个附加节点。