请帮忙分析语法结构?TKS!that 与 which 在这里分别引导的是什么从句?if a child had to consciously learn the set of abstract princeples that indicate which sequences of words are possible sentences in their language as opposed to those that are not,only the smartest would learn to talk,and it would take them many more years than it actually does.

that 此处是定语从句的引导词，其先行词为abstract principles, 而which 为宾语从句的引导词，整个which从句做的是动词indicate的宾语成分。所以which宾语从句是内嵌于that定语从句中的，而that定语从句又是内嵌于整个if条件状语从句中的。

that 引导的是主语从句。主语为：princeples.
which 引导的是谓语从句。谓语为：indicate.

如果一个孩子必须有意识地去学一套抽象的规则,这些规则表明在他们的语言中哪些词汇的顺序是可能的,与那些不可能的形成对照,那么仅仅那些最聪明的孩子将会学会说话,而且会比实际上花费更多年的时间.你从我的翻译中可...

that引导的是定语从句，用于修饰先行词princeples ；which引导的是宾语从句，为indicate的宾语。