It also used somewhat awkward syntax to define the valid XML structure.
它还使用有些拙笨的语法来定义有效的XML结构。
Such awkward syntax is common to coverage of drones: these do not, by definition, fire by act of will.
这种蹩脚的句法在无人战机的新闻报道里屡见不鲜：这些无人战机，仅从其名字上看，就不具备自主行为能力。
However, some people dislike DTD for its awkward syntax, limitations in the text and markup constructs it can express, and the difficulty of handling XML Namespaces.
但是，一些人不喜欢 DTD，因为它丑陋的语法、表达文本和标记结构的局限性，并且难以处理 XML Namespaces。
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