题目:in an experiment ,two-year-old boys and their fathers made pie dough together using rolling pins and other utensils .each father-son pair used a rolling pin that was distinctively different from those used by the other father-sin pair, and each father repeated the phrase "rolling pins" each time his son used it. but when the children were asked to identify all of the rolling pins among a group of kithen utensils that included several rolling pins ,each child picked only the one that he had used . which of the following inference is most supported by the information above ? a.the child did not grasp the function of the rolling pin b.no two children understood the name "rolling pin" to apply to the same object c.the children understood that all the rolling pins have the same general shape . d.each children was able to identify correctly only the utensils that he had used . e.the children were not able to distinguish the rolling pins they used from other rolling pins . 答案是b, 我懂整个的逻辑意思,但是就是不理解答案的这句话,求大牛把B选项翻译成准确的中文,并且分析下这个句子的语法结构,主谓宾什么的,我觉得这句话的语法错误啊,什么叫understood the name "rolling pin"to apply to .. understand 有这种用法吗?这句子怎么看怎么不懂啊。。