系统周期时态表的数据版本控制。
TimeDB是一个开源时态关系数据库产品。
TimeDB is an open-source temporal relational database product.
此列捕获从系统周期时态表中删除该行时的时间戳。
This column captures the timestamp when the row is deleted from the system-period temporal table.
历史表必须拥有与系统维护的时态表相同的列数和列顺序。
The history table must have the same number and order of columns as the system-maintained temporal table.
如果你用无可挑剔的大众英语以现在时态提出问题，“你明天会到这里来吗？”
When you ask, in perfectly normal English, and in the present tense, "Are you coming tomorrow?"
包含时态数据的表有两个日期-时间列，它们表明每一行有效的期限(时间间隔)。
A table that includes temporal data has a pair of date-time columns that indicate the period (the time interval) when the row is valid.
IBM的方法有望成为数据库中的标准，SQL标准的下一个版本将包含时态功能。
IBM's approach is expected to become the standard among databases, and the next edition of SQL standard will include temporal functionality.
OracleFlashBack是另一个时态数据库产品，支持记录时态特性。
Oracle FlashBack is another temporal database product that supports the record-temporal feature.
对于系统时间表，DB 2还帮助将历史数据存储在一个与时态表相关联的历史表中。
For system time tables, DB2 also helps store historical data in a history table associated with the temporal table.
关系数据库如Oracle或MicrosoftSQLServer是无时态的。
Relational databases such as Oracle or Microsoft SQL Server are non-temporal.
确定词干是查找单词中不变部分的过程，它是单词中与时态和语气无关的保持不变的片断。
Stemming is the process of finding the constant part of a word, which is the fragment that stays the same no matter which word tense or mode is used.
另一方面，如果你的语言没有区分将来时态，你说现在和未来的句式是一样的。
If, on the other hand, you speak a futureless language, the present and the future, you speak about them identically.
听录音的时候，要注意Rudi和Wolfgang用来讨论项目进展的词汇和动词时态。
As you listen, pay attention to both the vocabulary and the verb tenses Rudi and Wolfgang use to discuss the progress of the project.
当时态表中的一行被更新时，DB2更新该行并自动将该行的以前版本转移到一个历史表中。
When a row in a temporal table is updated, DB2 updates the row and DB2 will automatically move the previous version of the row to a history table.
不定式可以带宾语或状语构成不定式短语，没有人称和数的变化，但有时态和语态的变化。
Infinitive form can take object or adverbial infinitive phrase, there is no person and number of changes, but sometimes tense and voice changes.
在这种情况下，一方面要搜索和替换一个字，另一方面就得改变动词的时态，这就需要改变整个文本。
In this case, it is one thing to have to search and replace one word, and another is to have to change a verb tense, which will require changing the whole text.
我们用过去完成进行时态来形容一个在过去开始的行动，这个行动持续到过去的另一个时间。
We use the past perfect continuous tense to show that an action started in the past and continued up until another time in the past.
记住要用肯定的现在时态来写并为每个目标设定截止日期，就像我们从前设定长期目标和短期目标时一样。
Remember to write them in the positive present tense and remember to set a deadline for each goal. Just like we did when setting your long term and short term goals.
一项隐含的DB 2限制会强制要求bus_start值小于bus_end值，确保时态数据的完整性。
An implicit DB2 constraint enforces that bus_start values are less than bus_end values, ensuring temporal data integrity.
高级搜索的另一个好处就是可以在搜索结果中匹配不同单词形式，比如复数、不同的动词结尾和各种语法时态。
Advanced search has the added benefit of matching different word forms, such as plurals, alternate verb endings, and various grammatical tenses, in the search results.
历史表不得包含时间段，必须具有与时态表相同的编码模式和编码字符集标识符(CCSID)(参见清单2)。
The history table must not include a period and must have the same encoding scheme and Coded Character Set Identifier (CCSID) as the temporal table (see Listing 2).
涉及业务时间的时态查询也很容易编写，您仅需要在from子句中包含FOR BUSINESS_TIME。
Temporal queries involving business time are also easy to write-and you need only include FOR BUSINESS_TIME in the FROM clause.
尽管DB 2将自动存储行的历史版本，但您必须创建一个历史表来包含这些行，并将它与系统周期时态表相关联。
Although DB2 will automatically store historical versions of rows, you must create a history table to contain the rows and associate it with the system-period temporal table.
没有任何周期规范的SELECT语句仅适用于系统周期时态表，为仅需要最新数据的应用程序提供了性能收益。
SELECT statements without any period specifications apply only to data in the system-period temporal table, providing a performance benefit for applications requiring only current data.
DB 2将历史表中的sys_end值和时态表中的sys_start值设置为与最新的事务相关联的开始时间。
DB2 sets the sys_end value of the row in the history table and the sys_start value in the temporal table to the start time that is associated with the most recent transaction.
知识工程师将这些问题和备选方案写成文档，编写文档时采用将来时态，其口吻就像技术导师在交谈时所使用的口吻一样。
A knowledge engineer documents the issues and alternatives, writing in the future tense and a tone that a technical mentor would choose in a personal conversation.
而另一方面，说中文的人不必用这种方式道出某种行为的确切时间，因为同样的动词形式可以用来表达过去、现在或将来时态。
Chinese, on the other hand, does not oblige its speakers to specify the exact time of the action in this way, because the same verb form can be used for past, present or future actions.
而另一方面，说中文的人不必用这种方式道出某种行为的确切时间，因为同样的动词形式可以用来表达过去、现在或将来时态。
Chinese, on the other hand, does not oblige its speakers to specify the exact time of the action in this way, because the same verb form can be used for past, present or future actions.
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