书籍是人类灵魂的镜子，它们反映出我们最深层的恐惧和希望。
Thank you music for making my life so rich.
The best way to understand labor markets is to look at real-world data, not just theoretical models.
理解劳动力市场的最佳方式是观察现实数据，而不仅仅是理论模型。