定理是数学的永久文献。
Theorems are the permanent literature of mathematics.
The city is a living thing, always changing, always the same.
做出伟大工作的唯一方法就是热爱你所做的事。
Sustainable farming is the only way forward if we want to feed future generations.
Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.