adjacency list structure的用法和样例：
- Using adjacency list to save topology structure in power flow calculation, the calculation time is greatly reduced.
- According to the characters of mid-voltage distribution system, the adjacency list of data structure is introduced to save its topology structure.
- The objects are stored behind the list structure.
- The method takes station-train adjacency list as its basic data structure and rebuilds the rail-net with the restriction of train routes, to make the got-route data validity and rationality.
- So the storage structure of finite automaton should the choosed adjacency lists.