Lines of code in DSLs frequently start with a quantity, call some intermediate methods to get work done, and eventually return an instance of the interesting final type.
DSL中很多代码行经常以数量开始，调用一些中间方法来完成工作并最终返回有趣的最后一个类型的实例。
2
The final EXTRACT function that gathers the relevant Quantity values is shown below in Figure 21
最后，EXTRACT 函数收集相关的 Quantity 值，见图 21
3
Our commodity inspection department provides the quality, quantity testing certificate is final, and have the binding force to both sides.