Optimal fiscal policy requires that tax rates be smooth over time, responding only to permanent changes in government spending.
最优财政政策要求税率随时间平稳变化，仅对政府支出的永久性变化作出反应。
The first sentence of the novel is the most important, but the last sentence is the one that stays with you.
可持续性不是一种选择；它是农业未来的必需品。
Literature is the passport to enter a larger life.
I'm not a girl who lives in fear. I'm a girl who lives in freedom.
The story you are about to read is a work of fiction. Remember that.