The best way to learn is by doing, not just by listening or reading.
The future of liberal democracy depends on its ability to address the challenges of inequality and political polarization.
The world is a stage, but the play is badly cast.
True leadership means helping others to be better than they thought they could be.
引力波的发现为宇宙打开了一扇新的窗户。
创新的关键不仅在于创造新技术，还在于理解如何应用它们来解决现实世界的问题。