Probe is made of unique four tuples, as shown below
探测是一个惟一的四元组，如下所示
Listing 3. Using make_tuple to return tuples from functions.
清单3.使用make_tuple来从函数返回元组。
Tuples are delimited by curly brackets (see Listing 13).
元组要放在花括号中（参见清单 13）。
There are also quite a few functions you can run on tuples.
您还可以对tuple运行一些函数（请参见清单 9）。
By default, we will only cache tuples potentially smaller than 150,000.
默认情况下，我们将仅可能缓存少于150,000的元组。
Comparing tuples of unequal lengths results in a compile-time error.
比较不同长度的元组会产生编译时错误。
Tuples can contain Numbers, strings, variables, and even other tuples.
tuple可以包含数字、字符串、变量，甚至其他tuples。
Tuples are a composite data type and are used to store collections of items.
元组是复合的数据类型，用于存储数据项的集合。
Tuples are 0-indexed, as you'd expect; you can access the last item using the -1 index.
Tuples 从 0 开始建立索引，这很正常；您可以使用 -1 索引访问最后一个项目。
It's important to keep the following facts in mind when you're working with tuples.
在使用元组时，务必牢记以下事实。
For example, tags in tuples can be used to select different operations (see Listing 33).
例如，可以使用元组中的标签选择不同的操作(参见清单33)。
They improve performance by reducing the number of tuples fetched during query execution.
通过减少执行查询时需要检索的元组（tuple）的数量，以及减少查询所需的计算，函数索引能够显著改善性能。
Tuples contain primitive elements of mixed types and can even contain other tuples or lists.
tuple包含固定类型的原语元素，甚至可以包含其他 tuple或列表。
The three most prominent data structures in Haskell are tuples, lists, and user-defined types.
Haskell中最突出的三种数据结构是：tuple、列表(list)和用户定义的类型。
The resulting list of RIDs contains exactly those tuples that will join, which makes the join efficient.
由此产生的RID列表正好包含那些将要连接的元组，这就使得连接更加有效。
The where clause directs the program to discard particular tuples if they do not meet particular conditions.
如果特定的元组不能满足特殊条件，那么where 子句命令程序废弃这些元组。
This output is emitted as a file of tuples, representing the word and the number of times it appeared in the input.
输出是一个包含元组的文件，元组表示单词和它在输入中出现的次数。
We've looked so far really at two non-scalar types. And those were tuples written with parentheses, and strings.
关于这两种基本类型我们已经，学的相当多了，包括哪些元组和字符串类型。
Conceptually, rows of relational data (tuples) flow through the operation nodes in the query plan from bottom to top.
从概念上来说，关系数据行(元组)按照自下向上的方式流过查询计划中的操作节点。
The child list is more subtle: Strings can be interleaved with tuples in the list, indicating a mixed content element.
子列表更为精巧：在列表中字符串可以与元组交错，表示混合的内容元素。
In addition to one or more MVC tuples, a Monkeybars application USES two key helper files to prepare and run your code.
除了一个或多个MV c元组外，Monkeybars应用程序还使用2个关键的助手文件来准备和运行代码。
Tuples are not a game-changing feature, just another one of those "niceties" that makes Scala a powerful language to use.
元组并不是一个非常具有变革性的特性，它只不过是又一个使Scala成为强大语言的优秀特性。
The operators work by comparing each individual element of the two participating tuples from left to right (see Listing 6).
这些运算符的工作原理是从左到右地比较两个参与元组的每个单独的元素(请参见清单6)。
The ideal value for this setting will vary on a per environment basis, however a good starting point would be 10000 tuples.
该设置的理想值会随环境而变化，不过一个好的起点是10000个元组。
The main drawback of Rinda is that it's not persistent, you lose all tuples in the space when it is stopped or when it crashes.
Rinda最大的缺陷是其不支持持久化，这样一旦程序停止或崩溃的话，所有在元组空间中的元组则会丢失。
Performance benefits are realized when an index reduces the number of rows (or tuples) examined by the DBMS during query execution.
索引可以减少DBMS在执行查询时检查的行(或元组)数量，从而获得性能增益。
This does not mean that all tuples up to 150,000,000 will be stored in the cache as other heuristics are also considered by the engine.
这并不意味着所有达到150,000,000的元组都将存储在缓存，因为其他探试程序也是该引擎所考虑的。
No specialized Python classes are used in the representation — just tuples, dicts, lists, and strings (and None in the reserved position).
表示中没有使用专门的python类——只使用了元组、字典、列表和字符串(以及保留位置上的None)。
Googles new datastore defines a data model that lies between the abstract tuples of an RDBMS and the concrete row-column storage of NoSQL.
Google新的数据存储定义了一种介于RDBMS抽象元组和NoSQL具体的行列存储之间的一种数据模型。
You use the for clauses to specify a set of Cartesian tuples on which the rest of the expression will be evaluated, shown in Listing 1.
如清单1所示，使用for子句来指定一组笛卡尔元组，表达式的其余部分将对该元组求值。
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