在这个示例中，where子句的图形模式中的第一个三元组与foaf：name属性为“JonFoobar”的节点匹配，并把它绑定到名为contributor的变量。
In this example, the first triple in the WHERE clause's graph pattern matches a node with a foaf: name property of "Jon Foobar," and binds it to the variable named contributor.
WHERE子句引入第二个变量concept并定义与图形匹配的三元组。
The WHERE clause introduces a second variable, concept, and defines triples that are matched against the graph.
您不仅能够将序列直接传递给构造函数，还可以将拥有元组或字符串的变量传递给list 构造函数。
You aren't limited to passing a sequence directly into the constructor; you can also pass a variable that holds a tuple or a string into the list constructor.
例子里的第二个case，我们已经解出了元组里的值并且附给了局部变量，然后在结果表达式中使用了这些变量。
In the second case in this example, we've extracted the values inside the tuple to scoped variables, then reused these variables in the resulting expression.
元组赋值：一种赋值语句，等号右侧用一个序列，左侧为一个变量构成的元组。
An assignment with a sequence on the right side and a tuple of variables on the left.
下面的示例演示如何循环一个序列，以及如何使用元组模式来代替简单变量。
The following example shows how to loop over a sequence, and how to use a tuple pattern instead of a simple variable.
探讨了不同变量组合的各方程的相关性，证明三元组合为最佳；
The study on the correlativity among equations of different variable combinations suggests that ternary combination is the optimal one.
探讨了不同变量组合的各方程的相关性，证明三元组合为最佳；
The study on the correlativity among equations of different variable combinations suggests that ternary combination is the optimal one.
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