求翻译：高期望研究结果存在的问题之一是，它在定义上涵盖了一系列的行为、信念、操作策略。其中一项研究对高期望值的定义包含了，老师要确保学生在学业上分配更多时间这一项决定。这肯定是一个是好办法，但从研究的角度来看，很难从高期望产生的影响中分清哪些才是在学业上投入更多时间产生的影响。也很难将其转为课堂上具体的行为。是什么意思？

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