The study of black holes has revolutionized our understanding of space and time.

农业现代化不是口号，而是实实在在的行动。

我不断地看到有些人在生活中越过越好，他们不是最聪明的，甚至不是最勤奋的，但他们是学习机器，他们每天夜里睡觉时都比那天早晨聪明一点点。

I don't try to time the market. I just try to buy stocks that are undervalued.

I’m a very positive thinker, and I think that is what helps me the most in difficult moments.

人は、誰かに必要とされることで生きる意味を見つける。

经济学的任务不仅在于解释现象，更在于为社会提供实际的建议和政策。

"In observational studies, we often have to rely on assumptions that are not directly testable."