attention span

She has a short attention span and often loses focus after about ten minutes.她的注意力持续时间很短，通常在大约十分钟后就会分心。

The teacher uses short, varied activities to help students with a limited attention span stay engaged throughout the lesson.老师采用简短、多样化的活动来帮助注意力持续时间有限的学生在整堂课中保持专注。