Even though most of the service is free, calls to some rural areas and calling other countries outside the contiguous us requires payment.

尽管绝大多数功能是免费的，但往一些乡村地区以及非毗邻美国的其他国家打电话需要付费。

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This entry lets us know that there was an allocation failure, which presents itself when there is not enough contiguous space in the heap to allocate the object.

通过这个条目，我们能够知道有一个分配失败，当heap内没有足够的连续空间可以分配给对象时，就会发生分配失败。

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