prototype kilogram

例句：

1. 1.The prototype of the new car was a sleek and modern design.
   这款新车的原型是一个光滑而现代的设计。
2. 2.The prototype of the new software was developed to test its functionality.
   这款新软件的原型是为了测试其功能而开发的。
3. 3.The prototype of the new product was designed to meet market demand.
   这款新产品的原型是为了满足市场需求而设计的。