节点可以是一段文本(比如元素的内容)、一个元素、一条处理指令或者注释。

A node can be a piece of text (such as an element's content), an element, or a processing instruction or comment.

youdao

比如，一段小程序可以抹去所有的内存；一条简单的指令可以使主机停止运行。

A tiny program can clear all of memory. A single instruction can stop the machine.

youdao

过了一段时间，伯顿才承认，伊恩索是他买回来的，而且是只受过严格的训练的狗 - 不过训练指令是威尔士语的。 伯顿擅长这种语言，而泰勒完全不懂。

It was some time later that Burton admitted that he had actually purchased the dog fully trained, but only to commands spoken in Welsh--a language that he spoke fluently, and Taylor spoke not at all.

youdao