可数名词：

1. 学生，（尤指）小学生

2. 弟子，门生，门徒

3. 瞳孔，眸子，瞳仁

词形变化

形容词pupilar

英语解释

a young person attending school (up through senior high school)

a learner who is enrolled in an educational institution

contractile aperture in the iris of the eye