求翻译：许多教师认为听力教学费时且效果不明显，为了提高学生的笔试成绩，他们将大部分时间放在阅读教学和语法训练上，造成听力训练的缺乏是什么意思？

Many teachers believe that listening teaching time-consuming and ineffective, in order to improve students' written exam, they will most of the time on the teaching of reading and grammar training, resulting in hearing the lack of training

Many teachers think that listening is not time-consuming, and obviously, in order to enhance the Student's test results, they will spend most of their time in teaching and grammar training read, which lack the trained hearing

Many teachers thought the hearing teaching time-consuming also the effect is not obvious, in order to enhance student's written examination result, they place the majority of time in the reading teaching and the grammar training, creates the hearing training lacking

Many time-consuming and listening teaching of teachers think that effect is not obvious, in order to raise students ' test scores, they spend most of their time in the teaching of reading and grammar on a train, resulting in lack of listening training

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