Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence.
Uncertainty is not the absence of information, but the presence of too much conflicting information.
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.
中亚的游牧民族像风一样自由,除了地平线,没有任何墙壁能束缚他们。