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.
质量不是一个项目，而是一种文化。
计算机科学中的真正挑战不是编写程序，而是理解计算的本质。
The blood in the animal body is impelled in a circle, and is in a state of ceaseless motion.