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。
You enter this command on one line, by the way, although it's broken into two here to fit the developerWorks format.
顺便说一下，必须在一行上输入该命令，这里是为了适应developerWorks 格式才将它分成两行。
White's book is a powerful learning tool that will act like a mentor, teaching you the tricks of the trade in an easily broken-down format so you can take action.
怀特的书便是一个强大的学习工具，它就像是一位导师，用易于分解的方式，教你学会电子邮件营销的各种技巧，以便于你采取行动。
White's book is a powerful learning tool that will act like a mentor, teaching you the tricks of the trade in an easily broken-down format so you can take action.
怀特的书便是一个强大的学习工具，它就像是一位导师，用易于分解的方式，教你学会电子邮件营销的各种技巧，以便于你采取行动。
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