求翻译：2.在现代教育中特别强调教师应对所有的学生抱有高期望值这一观念。学生的成就动机与学生的学习成绩成正相关。即成就动机高的学生，其学习成绩也较高。但成就需求过高往往使学生产生过大的压力并引起焦虑，使视野变小，看不到问题的全貌和实质，使人的思维囿于与问题有关的狭小的范围内；使人的注意力集中在一些不相关的内容上， 从而忽略了解答问题所必须的最重要的事实。成就需求过高很快就会使人处于只见树木不见森林的状态。而成就需求过低，会使人放松自我要求，容易产生注意力涣散，易受干扰，学习效率低，学习效果差。是什么意思？

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2.In a modern education in particular stressed that teachers should be in all of the students have a high expectations. Student achievement motivation and the learning achievement of students into being. That is, high achievement motivation of students, their learning achievement is also higher. But

2. Special emphasis in modern education teacher should have high expectations of all students of this concept. Achievement motivation of the student and the student's academic achievement as being related. That high achievement motivation of students, the learning achievement is also higher. Achieve