求翻译：在一段时间内感觉不到进步时，学生又会产生畏难心理，失去学习兴趣。所以，教师首先应向学生阐明听力学习的特点和方法。是什么意思？

Feel progress over time, the students will have a fear of difficulty psychological, loss of interest in learning. Therefore, teachers should students first to clarify the characteristics and methods of the hearing to learn.

In a period of time when you feel progress, students will also have a hesitating, lose interest in learning. Therefore, teachers should be the first students to articulate the characteristics and listening learning method.

正在翻译，请等待...

When you do not feel the progress over time, students will feel difficult psychological, lost interest. Therefore, teachers should first clarify the characteristics and methods of listening to students.

In a period of time inner sense could not realize when progress, the student can produce fears difficulties the psychology, loses the study interest.Therefore, the teacher first should expound the hearing study characteristic and the method to the student.