The joy of discovery is what keeps scientists going.

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

事前考虑清楚，可是一旦到了该行动的时候，就要毫不犹豫，放手一搏。

人体是生物工程的杰作。

所有财富都是劳动的产物。