But since XML documents are broken at arbitrary positions in the block-level format, it is necessary to record a stack of open elements where a block begins.

但因为XML文档在块级别格式中是从任意位置断开的，因此有必要记录打开元素(块在其中开始)的堆栈。

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It brings dozens of open source projects into a single framework, where they coordinate to deliver the enterprise stack.

它将许多开放源码项目放入单个框架中，协同交付企业堆栈。

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By dropping tabs on top of one another in Opera's new beta version, you can create a "stack" -a single unit on the TAB bar that contains a group of open pages.

在Opera新的be ta版中，可以将一标签撂到另外一个标签上，就形成了一个“栈”——标签栏上的一个单独单元，包含一组打开的页面。

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Open Stack cloud services company, SoftLayer, seems to be doing the acquisition dance with a couple of suitors at the moment.

FORBES: IBM Eyeing A $2 Billion Acquisition?

Companies like Spike Source and SourceLabs tried to put together subscription-based models for productizing the open source stack.

FORBES: Red Hat At $1 Billion

Neither worked out, probably because the open source software stack is not as generic and interchangable as the operating system.

FORBES: Red Hat At $1 Billion