... 2、新的“强类型HTML的辅助方法”，现在支持了Lambda表达式，从而可以使你使用到数组(array)或者集合索引(collection indexes)。例如现在可以这么做：Html.EditorFor(m=>m.Orders[i]) ，这段代码将会生成以序列i为name、具体数组中的值为value的标签。
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用于访问数据项的索引只声明集合中越过第一个数据项有多远，或者称为序列，您需要去获得所需的内容。
The index used to access items just states how far past the first item in the collection, or sequence, you need to go to get what you want.
目前已经提出了许多结构连接的算法，它们中的大多数都基于如下的前提条件之一：输入元素集合存在索引或者有序。
There have been a number of algorithms proposed for structural join, and most of them are based on one of the following assumptions: the input element sets either have indexes or are ordered.
偏移和长度已超出数组界限，或者计数大于从索引到源集合末尾的元素数。
Offset and length were out of bounds for the array or count is greater than the number of elements from index to the end of the source collection.
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