任何圆的周长与其直径的比率小于3 1/7但大于3 10/71。

The human soul is a labyrinth, full of twists and turns, and we are all trying to find our way out.

Competitive strategy is about being different. It means deliberately choosing a different set of activities to deliver a unique mix of value.

The instinct to fear risk forces the poor to take bigger risks.

我们必须拥抱新技术和新理念，否则将在快速变化的能源格局中落后。

商业成功的关键不仅仅是满足客户，而是要超越他们的期望。