Each specializes in feeding at specific points in the cycle of decay, and can have anywhere from two to 100 different enzymes.
在衰变周期的特殊的点上每一种不同的供养方式，会产生从2 - 100中不同的生物酶。
2
The game used in the study was "Rise of Nations", in which gamers score points for building cities, feeding and employing their people, and maintaining and expanding their territory.
研究中使用的游戏是“国家的崛起”(Rise of Nations)。在游戏中，通过修建城市、供养和雇佣自己的人民以及保护和扩张自己的领土，玩家都可以得分。
3
Then the key points in design of the automatic drawing die were discussed, including the structure, the working procedure, and the automatic feeding mechanism.