I take you on a simple stroll through Lisp's basic constructs and then ramp up quickly.

我会带您简单地领略一下Lisp的基本构造，然后快速的扩展开来。

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Let's take a look at the concurrency constructs that are built in to Clojure.

让我们来看一下构建在Clojure中的并发构造。

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Because these nodes are rarely accessed in the course of a transformation, Saxon constructs these nodes on demand rather than having them permanently take up space on the tree.

因为在转换过程中很少访问这些节点，所以Saxon按要求构造这些节点，而不是让它们永久占据树的空间。

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