——关键中的关键，在于每次学习之后输出的“心理愉悦感”是强是弱、是正是负。

　　The key to the key question is whether the outcome after each studying is positive or negative, strong or weak.

　　每个人都有这样的体会：在刚刚学习一门外语之时，那种新鲜感、急迫感、发奋感是相当突出的，

　　Almost everyone has this experience: when first learning a foreign language, one has excellent freshness,urgentness and diligence.

　　但随着几堂课之后，很多人就兴致渐跌，顿感枯燥了！

　　But afer just a few lessons, many people feel less interested, even bored.

　　让我们冷静地省查一下最本质的原因：

　　Let’s calmly examine the core cause:

　　第一节课学完后，能够因内容的新鲜和在空白基础上掌握崭新内容而感到愉悦。

　　After the first lesson, one feels very pleasant because one has learned fresh and brand-new knowledgeout of blank foundation.

　　那么第二节课时，在上课前所输入的将不仅是第一节课的知识，

　　Before the second lesson begins, one has not only the knowledge of the first lesson,

　　更深层的输入则是上节课学习所获得的心理愉悦感。

　　but also the pleaure one gets during the previous lesson.

　　那么第二节课的学习过程中，将受到上节课的心理愉悦程度与本节课的学习方法所带来的心理愉悦程度的双重制约。

　　During the second lesson, one is restriced by not only the degree of the sense of pleasure of the previouslesson, but also the degree of the sense of pleasure brought by the study method of this lesson.

　　第三、四、五……节课同样如此。

　　And so on and so forth for the third, fourth, fifth…lessons.