分组和组织的过程不是任意的，而是遵循明确的规律
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
Forests are the lungs of our planet; we must treat them with the respect they deserve.
本当の強さとは、弱さを認めることだ。
我不考虑年龄。我考虑的是精神。