求翻译：处于高等教育和高中教育“夹缝”位置的中等职业教育的生源基本都是升入高中无望才选择上中等职业学校学习的学生，绝大部分学生英语基础相当差，再加上中专入学免试门槛低，有些因为某种原因未能完成九年义务教育的学生也可入学，因此良莠不齐的现象每校每班都存在。是什么意思？

In higher education and high school education "caught " position of secondary vocational education students entering high school are basically hopeless before choosing a secondary vocational school students , most students basic English is very poor , plus secondary enrollment exemption threshold

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Is in the higher education and the high school educates “the crevice” the position medium vocational education fresh source basic all is rises into the high school hopelessly only then to choose the student who on the secondary vocational school studies, the major part student English foundation ser

In higher education and higher education, "caught between" position of the students in secondary vocational education are basically hopeless entered high school choices on learning of students in secondary vocational schools, most students English is very poor, coupled with a low threshold for secon

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