关键是第二行中的样式表处理指令（PI）。

The key is the stylesheet processing instruction (PI) in the second line.

youdao

处理指令只是一种执行的手段。

A processing instruction is just one way to do it.

youdao

通常不使用处理指令或者PI。

I don't use processing instructions, or PIs, often.

youdao

My secretary is able to process that command, my computer cannot process that command.

我的秘书都能做到，我的电脑却不能处理这项指令。

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