In times of crisis, true leadership is defined by the ability to make tough decisions with clarity and conviction.

生活就是选择，但要选择得好，你必须知道自己是谁，以及你代表什么。

The task of the teacher is to lead the student from the known to the unknown.

对事实进行分类并认识它们的顺序和相对重要性是科学的功能。