成员表达式包含成员标识符、成员函数或可以转换为成员的表达式。

A member expression contains a member identifier, a member function, or an expression that can be converted to a member.

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例如，当实际值或表达式是一个节点集时，一旦找到节点集的一个成员时，就可以立即知道最终的布尔值结果。

For example, when the actual value or the expression is a node-set, the final Boolean result is known as soon as a single member of the node-set is found.

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智能完成任务非常有效，实时过滤成员方法和变量以匹配你输入的表达式。

Smart Completion works at the right-hand side of assignments, filtering the list of methods and variables to match the expected type of expression.

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