For more information about valid expressions, see expressions in the Debugger.
有关有效表达式的更多信息，请参见调试器中的表达式。
When restrictions are applied, all valid expressions entered thereafter can be represented in either language.
当应用语法限制时，所有之后输入的有效表达式都可以使用任何一种语言表示。
Once a language and the grammar that formally describes it becomes complex, however, the number of valid expressions in the language grows rapidly.
但是，一旦正式描述它的某种语言和语法变得复杂，那么语言中的有效表达式数量将迅速增加。
It USES regular expressions to make sure that only valid characters are used in the file name and checks specifically for the dot-dot characters:...
它将使用正则表达式以确保文件名中仅使用有效字符，并且特别检查圆点字符：. .。
But the other XPath expressions are equally valid.
但其他XPath表达式也同样有效。
So both of the expressions Hi and 2 * 2 are valid XQuery code that will execute without any prelude or modification.
因此表达式Hi和2 * 2都是合法的XQuery代码，不需要任何准备或者修改就能执行。
Also, some valid forms of XML may not match your regular expressions, so you will have to modify them later.
而且，有些格式正确的XML可能与正则表达式不匹配，所以日后必须修改它们。
These expressions prevent the optimizer from assigning valid cardinality or selectivity estimates and can in turn affect the overall plan and the join method.
上面表达式使优化器不能有效分配基数或选择性消耗，可能会反过来影响整个执行计划。
Then, you can teach them that while emotions are never wrong and are always valid 7, our expressions of our emotions are within our control.
然后，你再告诉他们情绪没有对错之分，它们的产生总是有原因的，我们可以控制情绪的表达。
Then, you can teach them that while emotions are never wrong and are always valid 7, our expressions of our emotions are within our control.
然后，你再告诉他们情绪没有对错之分，它们的产生总是有原因的，我们可以控制情绪的表达。
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