The only thing that can make you happy is your own smile.
心智是一个计算器官的系统,通过自然选择设计来解决我们祖先在觅食生活方式中面临的各种问题。
In the realm of mathematics, every problem is an opportunity to discover something new.
生活艰难,事情并不总是顺利,但我们应该勇敢冒险,毫不犹豫地迈出下一步。