A man's life is limited, but service to the people is infinite.
人的生命是有限的，但为人民服务是无限的。
"The challenge of quantum mechanics is not in its complexity, but in its simplicity—it forces us to rethink our most basic assumptions about the universe."
最好的公司不仅仅是销售产品，它们还激发变革。
Children's books should challenge as well as comfort.