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1·Write these Ordinal Numbers in words.

用英语序数词表示以下数字。

2·The use of Roman Numbers as Ordinal Numbers in Chinese electronic media is currently nonstandard.

当前，中文电子媒体中作为序号的罗马数字使用很不规范。

3·In this lesson, learners will read, write, and understand Ordinal Numbers and also understand questions and statements about the day and month of one's birthday.

在这堂课中，学员将学会读写并理解序数词，读写并理解关于生日月份和日期的问题和描述。

4·Represented as an ordinal number followed by either a single .0 or a set of ordinal numbers separated by dots, the node data type corresponds to a position in a tree structure.

节点数据类型用一个序数加一个 .0 或一组以点号隔开的序数来表示，它对应于一个树结构中的一个位置。

5·For the finite set, the ordinal and cardinal Numbers are equivalent, but they differ in the infinite case.

有限集，有序和基数是等价，但他们在不同情况下的无限。