The value chain is the set of activities through which a product or service is created and delivered to customers.

The best way to design a program is to design it.

看着我，每个人的脸上都有印记。你第一次手术时，我长了这条皱纹，最后一次手术时，我长了这些皱纹。这张地图会为我们指引方向。而这张地图标记着我们去过的地方，它绝对不是丑陋的。