第一个版本可以生成两个完整的数组副本，而第二个版本则完全没有复制数组。

The first version might cause two full copies of the array, whereas the second causes no copying at all.

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当把数组名用作参数时，传递给函数的值是数组起始元素的位置或地址——它并不复制数组元素本身。

When the name of an array is used as an argument, the value passed to the function is the location or address of the beginning of the array - there is no copying of array elements.

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通过使用这些方法访问较大的数组，您可以确保只复制本机代码将要实际使用的数组部分。

By using these methods to access larger arrays, you can ensure that you copy only the region of the array that the native will actually use.

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