The representation or imitation of a physical or social system or its activity by computers for the purpose of predicting the behavior of that system under certain conditions.

模拟；仿真(用电脑模仿实，社会体系或其活动以预测这个体系在某些条件下会出现的状况)。

One such representation or model.

(用电脑所做的一个)模拟；模型。