农业是制造业和商业的基础。

在数学中，提出问题的艺术必须比解决问题更有价值。

In times of change, the ability to learn is far more important than the ability to know.

In the realm of physics, we are not just observers but also creators of the reality we seek to understand.

孩子们值得拥有挑战他们的书，而不仅仅是娱乐。