This is an iterative function, meaning that if you call it again, you'll get the next result in the set (and so on, until there are no results in the result set, in which case, it will return false).

这是一个迭代函数，这意味着如果您再次调用它，会得到结果集中的下一个结果(依此类推，直到结果集中没有结果，如果没有结果，则返回false)。

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If you see no results, there are several possible issues.

如果您没有看到结果，可能有几个问题。

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Since there are no steps following the variable name, this query expression results in a single node which happens to be the current node.

由于在变量名后面没有任何步骤，因此该查询表达式将产生一个单一节点，即正好是当前的节点。

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Russian President Vladimir Putin insists there are no plans to reverse the results of Yeltsin-era privatization.

FORBES: Magazine Article

Preliminary results are expected within the year, but there is no specific timetable and final results could be years off.

NPR: AP: NY Fracking Held As Cuomo, RFK Jr. Talk Health

Officials from the Chinese Olympic Committee have confirmed to the state-run news agency Xinhua that all of the Chinese athletes in the games are currently "clean" and that so far there has been no notice from the IOC about athlete doping test results that are positive or abnormal.

CNN: IOC confirm six athletes test positive