质量不是机会；它是一种选择。

Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.

I must confess that I never could see any beauty in her. Her face is too thin; her complexion has no brilliancy; and her features are not at all handsome. Her nose wants character; there is nothing marked in its lines. Her teeth are tolerable, but not out of the common way; and as for her eyes, which have sometimes been called so fine, I could never see anything extraordinary in them.

数学和计算机科学之间的联系不是单向的；每个领域都丰富了另一个领域。

The stone industry must embrace sustainability to survive in the long run.