active search theory的用法和样例：
- The use of optimal search theory in the search model of disappeared tourist is deduced.
- The active search effort for two NFL players and their friend has been suspended tonight.
- In this paper, search theory and random programming are introduced to formation cooperative search analysis.
- Company WOLFRAM has also organized an active search of tungsten deposits huge enough to provide the plant with raw materials.
- Search Theory and Re-Employment of Laid-off Workers