truancy
noun [ U ] uk/ˈtruː.ən.si/ us/ˈtruː.ən.si/ (UK also truanting)
逃学，旷课
the problem or situation of children being absent from school regularly without permission
My daughter's school has very good exam results and hardly any truancy. 我女儿所在的学校考试成绩很好，几乎没有逃学的。
Truanting was a serious problem in a fifth of the schools surveyed. 在1／5被调查的学校中，逃学是一个严重的问题。