While mapping an author element to an author instance isn't too bad, there's not grouping element, like authors, that makes it clear that each author belongs to a single collection in a Book instance.
尽管把一个author元素映射到一个author实例没什么问题，但是没有分组元素，比如authors，它清楚地显示出所有作者属于Book实例中的一个集合。
The relevant factor that impacts the complexity of the job is the number of different grouping keys, not the number of different aggregated columns that you would see in counting functions.
影响任务复杂性的相关要素是不同分组关键字的数量，而不是在计数函数中所看到的，不同的所聚合列的数量。
While the ordering of the grouping columns does not matter for a single grouping set or multiple grouping sets, the order of the columns does matter for ROLLUP.
对于单一分组集或多个分组集，分组列的次序是无所谓的；但是对于ROLLUP，列的次序不能随意安排。
Notice that TIMEID is not one of the grouping columns of the outer select.
注意，TIMEID不是外层选择的分组列之一。
With this approach, grouping on an attribute is not possible.
使用这种方法时，就不可能对属性进行分组。
In this case, some apparent grouping may contain classes that do not respect the criterion.
在这种情况下，一些显然的分组可能包含不考虑标准的类。
But if you use multiple aggregations with the same grouping keys, or multiple counting functions that count the same column, it will not significantly increase the execution time of the rule.
但是，如果使用具有相同分组关键字的多个聚合，或者对相同列进行计数的计数函数，其不会显著增加规则的执行时间。
However, it specifically did not address the issue of supporting grouping operators for the aggregates.
然而，那篇文章没有解决在聚集中支持分组操作符的问题。
The experimenters wanted two groups of boys with not the faintest idea who was also in their own group or what the grouping meant or what they had to lose or gain.
实验者希望这两组孩子对于谁和自己同组，组别意味着什么，或者他们有什么得失这些问题几乎没有任何概念。
The European Council is a rough, swaggering sort of grouping. It operates not by finding cosy consensus, but by reaching grubby compromise after lots of camp-forming, bribery and bullying.
欧盟委员会充斥着一群态度粗暴、狂妄自大之人，他们并不是通过友好的共识来进行管理，而是经过拉帮结伙、行贿受贿和恃强凌弱达成肮脏的妥协。
Flash units may be used, but photographers are encouraged to use telephoto lenses and avoid grouping around speakers so as not to disturb their work.
可使用闪光灯，但鼓励摄影师使用长焦镜头并避免群聚在发言者周围以便不影响他们的工作。
FOR UPDATE does not support grouping and ordering, so you cannot create a finder that would get a set of rows from the database and order them by a specific column.
FOR UPDATE不支持分组和排序。因此您不能创建finder来实现从数据库获得一组行并通过指定的列来排序的目的。
Perl 6 grammars and regular expressions allow non-grouping matches, which do not save their result.
Perl6语法和正则表达式允许非分组匹配，不保存它们的结果。
The INSERT with VALUES is a special case because it would not benefit from executing through SQE because the statement lacks selection criteria, grouping or ordering.
INSERTwithVALUES是一个特例，因为它无法从通过SQE执行中受益，因为该语句没有选择标准、分组或排序。
In Perl 6, the non-grouping match specifier of [b|c] can be used so that "b" and "c" are not saved.
在Perl6 中，可以使用非分组匹配指示符 [b|c]，这样就可以不保存“b”和“c”。
The results showed that grouping did not facilitate the learning of temporal order information under both conditions.
结果发现，这两个操作对时间顺序信息学习的促进作用不显著。
The storage of materials in this facility does not follow the traditional approach of grouping books by topic but rather by book size, permitting the use of barcodes to store and retrieve them.
该设施中的物资存储没有遵循把书按主题分组的传统方法，而是按照书的大小，允许使用条形码来存储和检索。
This classification is not arbitrary like the grouping of the stars in constellations.
这种分类并不象把星座里的星体分成各群那样地随意。
Enumerations provide an alternative method of not only defining but also grouping sets of integral constants.
枚举提供了一种替代的方法，不但定义了整数常量集，而且还把它们聚集成组。
Being careless about naming files or not properly grouping them may save a little time in the beginning.
轻视文件命名或者没有适当地将图层建立成组可能在刚开始的时候能够节约一点时间。
Using layers is not the same as grouping either.
图层和成组是不一样的。
This is a useful grouping method, but it is not perfect.
这是一种有用的分类方法，但也不是完美的。
By grouping the 4 product lines together, we provide an integrated and comprehensive solution to our customers, not just on solution but also operational efficiency and after-sale support etc.
通过这四条产品线的整合，我们可以为客户提供综合的、全面的解决方案，这不仅仅体现在方案设计上，还包括了运营效率的提升和售后服务的支持等。
Such a grouping, moreover, should not focus on China alone.
另外，这样一个集团不应仅关注中国。
The research results show that the relation between business grouping and its performance are not obvious, and the absorptive capability has adjusting impact on this relation.
研究结果表明，企业集团化与企业绩效的关系不显著，吸收能力对于企业集团化与企业绩效的关系具有调节作用。
The device with simple structure can achieve the purpose that fruit skin is not damaged during the grouping screening process, thereby having wider application range and reducing the cost.
此装置结构简单，可实现在分组筛选过程中不损伤水果表皮，适用范围更广，且降低成本。
Do not include digit grouping symbols (such as a comma between thousands) or currency symbols.
不能包含数字分组符号(如千位间的逗号)或货币符号。
Do not include digit grouping symbols (such as a comma between thousands) or currency symbols.
不能包含数字分组符号(如千位间的逗号)或货币符号。
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