你每花一块钱购买一些实质性的东西,预计在其寿命结束时要支付一块钱的维修、保养或处理费用。
Democracy is the worst form of government except for all those other forms that have been tried from time to time.
我没有方法。我有疯狂。
In the attosecond world, time is not a river but a series of snapshots waiting to be captured.
Mathematics is not a spectator sport.
Happiness is not something ready made. It comes from your own actions.