题目内容：

nothing is more important to A than B的意思~
原句：Nothing is more important to the theory of words and rules than an explanation of how children acquire rules and apply them.

优质解答

这里的to ...是 对于...来说 的意思,这个句子相当于To the theory of words and rules,nothing is more important than an explanation of how children acquire rules and apply them.
翻译：对于词汇与规则的学习理论来说,没有什么会比如何让孩子学得与应用他们的详细说明更重要（或者：如何让孩子学得并应用词汇与规则才是最重要的）.