求翻译：据调查，大学生逃课并非个别现象，许多大学生都有逃课的经历，并且学生逃课率随年级升高呈现递增性。是什么意思？

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According to the survey, a college student who had fled after school is not an isolated phenomenon, many college students have experienced the school students, and school grades with a higher incremental.

According to the investigation, the university student skips classes by no means the individual phenomenon, many university students all have the experience which skips classes, and the student skips classes rate presents incremental along with the grade ascension.

According to the survey, students skipping classes are not isolated cases, many university students skipping classes experienced, and elevated rates of students skipping classes with grade increments.

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