最好的战略简单但不容易。
The best strategy is simple but not easy.
The most important thing in science is not to be afraid to ask questions.
"Don't let yesterday take up too much of today."
成功的关键不仅仅是努力工作,而是聪明地工作。
Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.