我希望被记住为一个善良且能带给人们快乐的人。
I don't sing because I'm happy; I'm happy because I sing.
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
每一种东西的价格都会因时间和地点的不同而涨落;每一次这样的变化都会改变货币的购买力。