匹配输出中的某些字段，而不只是对行进行匹配。
映射表不允许您更改输入结构中列表的维数来匹配输出结构。
The mapping table does not allow you to change the dimensionality of the lists in the input structure to match the output structure.
对依然无法完成的分析，选择若干最宽子树强制匹配输出。
To which is still unable to complete the parsing, chooses certain widest subtrees compulsion matched and then outputs.
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