| 1. | The ordinal number matching the number50 in a series
第五十在一系列中排于第50的序数 |
| 2. | Statistical interpretation ; ordinal characteristics
数据统计分析.序数特征 |
| 3. | The ordinal number matching the number19 in a series
第十九在数列中与数字19相配的序数词 |
| 4. | The ordinal number matching the number90 in a series
第九十在数列中与数字90相配的序数词 |
| 5. | The ordinal number matching the number nine in a series
第九在数列中与数字9相配的序数词 |
| 6. | The ordinal number matching the number14 in a series
第十四一序数词，一系列数中的第十四个 |
| 7. | Know the difference between ordinal numbers and cardinal numbers
对比基数词和序数词的不同 |
| 8. | Know how to distinguish and use ordinal numbers and cardinal numbers
掌握基数词和序数词的用法。 |
| 9. | Isomorphism between two - type ordinals and well - ordering two - type classes structues
二型序数与良序二型类的同构 |
| 10. | The ordinal number matching the number one trillion in a series
第一万亿，第一兆可数数列中与一万亿相对应的序数 |
