测试用例：不包含脚本或者执行指令。

Test case: Does not contain the scripting or the execution instructions.

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如果xsl： function元素具有xsl： fallback指令，则XSLT 1.0处理程序将完全忽略x sl： function元素，不执行其xsl： fallback。

If an XSL: function element has an XSL: fallback instruction, then an XSLT 1.0 processor ignores the XSL: function element entirely and does not execute its XSL: fallback.

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如果这些条件不都满足，或者第二条指令在执行之前需要等待依赖项，那么它们可以在单独的周期中执行。

If these conditions are not all met, or if the second instruction needs to wait for dependencies before issuing, then they are issued in separate cycles.

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