unexcused
adj. 未经允许的;不能原谅的
例句
With five unexcused absences you will be withdrawn from the class.
无理由地缺席五次,你将被这门课除名。
Three unexcused absences will result in failure to pass the class.
无故缺席三次(含)以上者,成绩不予通过。
If you have more than two unexcused absences, it may affect your final grade.
如果你有两次以上毫无理由的缺席,将会影响你的期末成绩。