1. For example, the cofinality of ω is ω, because the sequence ω·''''m''''(where''''m''''ranges over the natural numbers) tends to ω; but, more generally, any countable limit ordinal has cofinality ω.
例如，ω的共尾性是ω，因为序列ω·''''m''''(这里的''''m''''取值于自然数之上)趋向于ω；但是，更加一般的说，任何可数极限序数都有共尾性ω。
2. The first player from Group A says three ordinal numbers very quickly.
复习序数词把全班同学分成两组 Group A 和 Group B，Group A 的一位同学先说三个序数词，注意逢3，6，9的序数词要跳过，Group B 的一位同学要迅速地说出下面的三个序数词。
3. ordinal numbers的解释
3. T: Now listen to 2a and compare the cardinal numbers and the ordinal numbers.
2教师出示写有100以内基数词和序数词的小黑板或数字挂图或幻灯片，并播放录音，要求学生边听边注意比较基数词和序数词的异同。
4. Considering the superiority of interval numbers in solving the uncertainty problems, a model for evaluating the penetration effectiveness of missile based on interval numbers is established, and the adopted technologies, such us ordinal Euclid arithmetic, attribute system, weight coefficients and information concentration algorithm, are studied.
考虑区间数理论处理不确定问题的优越性，建立了基于区间数多属性决策的导弹突防效能评估模型，对导弹突防效能评估指标体系构建、权重确定和信息集结方法进行了研究。
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。
6. In Spanish the ordinal numbers are not used to express the days of the month.
在西班牙语中，序数词不被于表达月份的第几天。
7. 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。
8. A System for Measuring Fire Accuracy and the Ordinal Numbers of Bullets
带弹序立靶精度测试系统
9. Write these ordinal numbers in words.
用英语序数词表示以下数字。
10. Numerical idioms are idioms formed with cardinal numbers, ordinal numbers and other words which have the meaning of number.
数字习语，是指由基数词，序数词及其它具有数字意义的词构成的习语。
11. This article is a chapter from the serial A Discourse on the Beijing Dialect in Manchu, focusing on the pronunciation changes of ordinal numbers in sentences.
本篇是《谈谈满语的京语》连载“单词入句”的一章，专讲序数词入句后的音变。