The same system was used for ransoming or exchanging captives.

相同的制度还应用于赎回或交换俘虏。

In the Viking scenario, for instance, you'll have to earn money by ransoming cities, while in the Rise of Rome scenario you'll have to gain control of five separate victory locations.

比如说在维京（北欧海盗）人剧本，你必须靠勒索城市赚钱，而在罗马的崛起剧本你就必须成功地控制住五块相互分离的由胜利女神的地区。