求翻译：（Cognitive Load Theory）是在某种场合下施加到工作记忆中的智力活动的总的数量，对认知负荷起主要作用的是工作记忆必须注意的内容数量。认知负荷与教学设计、学习绩效有重要关联。是什么意思？

(Cognitive Load Theory) is imposed on certain occasions to intellectual activity in the working memory of the total number of working memory is playing a major role in cognitive load must be taken to the amount of content. Cognitive load associated with instructional design, learning and performance is important.