物理学和数学之间的界限并不像人们想象的那么清晰。
过去是一个不同的国家,他们做事的方式不同。
Trust is the foundation of any successful business relationship, and it must be earned every day.
真正的美国发现还在我们面前。我们精神、我们人民、我们强大而不朽的土地的真正实现,尚未到来。
When you solve a mathematical problem, you don't just get the answer - you understand why it's the answer.