Art should not be a luxury, but a daily necessity for everyone.
All life comes from an egg.
The world of the happy is quite another than that of the unhappy.
化学是连接物理学和生物学的核心科学。
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。