求翻译：智力是有不同层次的。在一个教学班中所谓"弱智"和所谓"神童"都是比较罕见的。虽然目前对智力和语言天赋已有较接近的看法，但还没有获得准确的定义：而且目前还没有可靠的工具对智力和语言天赋作出可靠的测量。所以讨论智力因素及语言天赋对学生的英语学习成效的影响，对于整体来说意义就显得不那么重要了。是什么意思？

Intelligence is a different level. The so-called "mentally retarded" and the so-called "child prodigy" are relatively rare in a teaching classes. Although the view has been closer to the current intelligence and flair for languages, but also did not get an accurate definition: there is currently no