景观研究是对自然与人类文化相互作用的研究。
Symmetry is a complexity-reducing concept (co-routines include subroutines); seek it everywhere.
When it's tough, will you give up, or will you be relentless?
在数学领域,每个问题都是发现新事物的机会。
What you are you do not see,what you see is your shadow,