程序码正在使用具有预设索引属性的物件，并尝试使用索引语法。
Your code is consuming an object that has a default indexed property and tried to use the indexed syntax.
过去人们对语言转述现象的研究大多局限于对其进行语法描述，重点放在直接引语和间接引语的转换关系上。
The initial research on language reports was restricted within the grammatical descriptions, which place emphasis on direct and indirect speech and the transformational relationship between them.
自由间接引语即由潜在的多个主体之间的代换而构成，而且代换规则与一般语法规则一致。
Free indirect discourse is constructed by the substitution of those subjects, and the rules of substitution coincide with general grammar.
感谢来信询问有关间接引语的问题。很多学生会发现在语法学习中，这是一个难点。
Thank you for your question about reported speech, which is an area of grammar that often causes problems for students.
感谢来信询问有关间接引语的问题。很多学生会发现在语法学习中，这是一个难点。
Thank you for your question about reported speech, which is an area of grammar that often causes problems for students.
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