The power of XForms really shows itself when you have data that contains homogeneous data sets at different levels, with one nested within the other.

当数据以不同级别通过嵌套方式包含同构数据集时，XForms 将尽显其功能的强大。

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In contrast to lists, tuples, and dictionaries, which may contain heterogeneous elements, Numarray arrays contain only elements of a homogeneous data type.

与可以包含不同类型元素的列表、元组和词典不同的是，Numarray数组只能包含同一类型的数据。

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Much of the power of the relational model comes from the fact that the relational table is the single data structure that represents homogeneous collections of data.

关系模型的大部分功能都来自于这样一个事实：关系表是代表同质数据集合的单一数据结构。

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