Also, get a quick look at some key features of XQuery's surface syntax.

此外，快速了解XQuery的表层语法的一些关键特征。

youdao

XML provides a surface syntax for structured documents, but imposes no semantic constraints on the meaning of these documents.

XML提供了表示结构化文档的表层语法，但没有对文档的含义施加任何语义约束。

youdao

Second, the feature seems at first glance to be simple, but in fact has a rather large "design surface" and would require adding a fair amount of new syntax to the language.

第二，这个功能第一眼看上去貌似简单，但实际上有一个十分广的“设计层面”，并且将需要增加许多新的语法。

youdao