copy 普通用词，含义广泛，指精确的或不精确的复制品。
duplicate 常指完全一模一样，可代替原件的复制品。
model 可指按某物式样制造、按比例缩小的模型，也可指某物未制成之前做出的模型。
reproduction 批按原物复制的产品，着重复制品与原物相似。
facsimile 含义与copy大体相同，但较文雅。
参考例句
1. to model an aeroplane out of balsa-wood 用西印度轻木做飞机模型
2. We have to make a new model plane. 我们不得不做一架新的飞机模型。
3. Represents the data model for the application. 表现了应用程序的数据模型。
英英解释
n.
1. a hypothetical description of a complex entity or process
2. a type of product
3. a person who poses for a photographer or painter or sculptor
4. representation of something (sometimes on a smaller scale)
5. something to be imitated
6. someone worthy of imitation
7. a representative form or pattern
8. a woman who wears clothes to display fashions
9. the act of representing something (usually on a smaller scale) v.
1. plan or create according to a model or models
2. form in clay, wax, etc
3. assume a posture as for artistic purposes
4. display (clothes) as a mannequin
5. create a representation or model of
6. construct a model of adj.
1. worthy of imitation
网络释义
Model 型号;
模型;
模特;
机锺;
mathematical model 数学模型;
数学模式;
數學模式;
Business Model 商业模式;
经营模式;
营运模式;
商業模式;
disjunctive model 分离模型;
Relational model （关系模型）：以表（或关系）的形式表示数据的数据模型。;
关系模型;
关 系 模 型;
式模型;
