不要害怕改变和成长。
Don't be afraid to change and grow.
用右手画圆形，左手画方形，不能同时画成
"Books are the plane, and the train, and the road. They are the destination, and the journey. They are home."
As we delve deeper into the quantum world, the importance of topology in understanding and manipulating quantum states becomes increasingly clear.
出自先秦《荀子·儒效》。对于所知道的东西就说知道，不知道的就说不知道；这样，对内是不欺骗自己的良心，对外是不欺骗他人。说明为人应当诚实的道理。