闭包，和lambda表达式相关的一个概念，贯穿整个LINQ查询的设计。

Closures, and the related concept lambda expressions, are used throughout the LINQ query design.

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表达式闭包是定义简单函数的一种便捷方式，用来模仿lambda符号。

Expression closures are a shorthand method of defining simple functions that mimics lambda notation.

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LinQ还需要支持lambda表达式(闭包)，尽管这一点在前面的查询例子中体现得不是很明显。

LinQ also requires support for lambda expressions (closures), though this is not obvious from the previous query example.

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