Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.
学习是系统中产生的任何变化，这些变化或多或少会永久性地改变其适应环境的能力。
世界充满奥秘，而这正是它的美。
It is the tears of the earth that keep her smiles in bloom。
The only way to learn mathematics is to do mathematics.
用努力证明自己，而不是用言语。
相信生命值得活下去，你的信念会帮助创造这个事实。
The past is what you remember, imagine you remember, convince yourself you remember, or pretend you remember.