说明：   典型的开发模型有：①瀑布模型(waterfall model)；②渐增模型/演化/迭代(incremental model)；③原型模型(prototype model)；④螺旋模型(spiral model)；⑤喷泉模型(fountain model)；⑥智能模型(intelligent model) 7. 混合模型(hybrid model)
(A typical development model has: ① waterfall model (waterfall model) ② Incremental models/evolution/iteration (incremental model) ③ the prototype model (prototype model) ④ spiral model (spiral model) ⑤ fountain models (fountain model ) ⑥ intelligent model (intelligent model) 7. mixed model (hybrid model))