For simplicity, this article only covers the evaluate method of XPathExpression.

为了简便起见，本文只讨论XPathExpression的evaluate方法。

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It compiles that expression and returns it as an instance of the XPathExpression class.

它编译该表达式并将其作为xpathexpression类的实例返回。

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XPathExpression objects are created by passing a String representation of the XPath expression into the compile method on XPath.

XPathExpression对象通过将XPath表达式的String表示传递给XPath的编译方法来创建。

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