Stray birds of summer come to my window to sing and fly away。 And yellow leaves of autumn， which have no songs， flutter and fall there with a sigh。

可持续性不是一种趋势，而是我们为后代共同承担的责任。

The interplay between discrete mathematics and computer science has been a fertile ground for innovation and discovery.

创新不仅仅是创造新事物，而是让事物变得更好。