函数式语言依赖于一等函数(可在任何其他语言结构可能出现的地方出现的函数)作为参数和返回值。

Functional languages rely on first-class functions (functions that can appear anywhere any other language construct can appear) as parameters and return values. Figure 3 illustrates this concept.

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该DTD把数据序列化为通常在面向对象编程语言中才会见到的(嵌套的)数据结构集：词典、数组、字符串、数字、boolean值、日期和二进制数据。

This DTD serializes data into a (nested) set of data structures that are common in object-oriented programming languages: dictionaries, arrays, strings, Numbers, booleans, dates, and binary data.

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