质量从来不是偶然的；它是智慧努力和持续专注的结果。

"Psychology should measure the mind by its outcomes."

森林的真正价值不能用板材英尺来衡量，而应该用地球的呼吸来衡量。

The training and improvement of labor are effective ways to increase productivity.

均衡的概念是理解战略行为的关键。