The blood in the animal body is impelled in a circle, and is in a state of ceaseless motion.
You have to stand up and say, 'There's nothing wrong with me or my shape or who I am, you're the one with the problem!'
数学是一项协作的努力。没有人可以单独完成。
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.