过去是一个异国他乡;他们在那里做事的方式不同。
The past is a foreign country; they do things differently there.
城市人工制品是一件艺术品,也是一份历史文献。
Theoretical physics is not just about solving equations; it's about understanding the fabric of reality.
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."