In the previous program, you used both integer and string data and never had to tell the Scheme language what type of data was being used.
在先前的程序中，您使用了整型和字符串数据，因此没有告诉scheme语言正在使用的是哪种类型的数据。
The choice of which language to use depends on the type of computer the program is to run on, what sort program it is, and the expertise of the programmer.
选择使用何种语言依赖于计算问题的类型，是什么类型的程序和编程者的专长。
The self-description is the key to program model simplification, multi-language integration, type safety and solving version conflict.
这种特性对于简化编程模型、提供多语言集成、实现类型安全和解决版本冲突等许多方面都具有重要的意义。
The self-description is the key to program model simplification, multi-language integration, type safety and solving version conflict.
这种特性对于简化编程模型、提供多语言集成、实现类型安全和解决版本冲突等许多方面都具有重要的意义。
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