数学不是一项观赏性运动。
江河的水之所以浩浩荡荡,并非只由一个源头流出来;无比珍贵的皮衣,并非只由一只狐狸腋下的毛皮所能制成。
"I see my social media as an extension of my diary—just more colorful and with better filters."