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

大自然是一位了不起的老师，只要我们耐心观察，她就会向我们揭示她的秘密。

Writing about crime is really writing about society's fractures and failings.

我的工作不是对人宽容。我的工作是把这些伟大的人才推向极限，使他们变得更好。