duck和fun中字母u发音相同，都发短[ʌ]音，pupil发音不一样。

My nephew is a second-year pupil.我的侄子是一个小学二年级的学生。This clever pupil learns things quickly.这个机灵的学徒学东西很快。The pupil adjusts its size according to the intensity of external light.瞳孔会根据外界光线强弱调整大小。Pupils contract in bright light.瞳孔在明亮的光线下会收缩。The school has over 400 pupils.这所学校有400多名学生。

6These complex formulae are beyond the grasp of the average pupil.这些复杂的公式是一般小学生不能理解的。由有道智云提供数据服务7Peter is a primary school pupil.彼特是一名小学生。