放肆粘级英文怎么说

"放肆"在英文中可以译作"rash"或"reckless"，意思是不计后果地做出冲动的或鲁莽的行为。"粘级"在英文中可以译作"to repeat a grade"，意思是重新修读一个学年的课程。

这个短语的来源可能是来自中文的直译。

例句：

"He was a rash driver and always took unnecessary risks on the road, endangering himself and others."（他是个鲁莽的司机，总是在路上冒险，危及自己和他人。）

"She failed her exams and had to repeat the grade."（她考试不及格，必须重新修读一个学年的课程。）