plipu能组成英文单词：pupil美/ˈpjuːpl/英/ˈpjuːpl.学生；[解剖]瞳孔；未成年人复数pupils双语例句:My nephew is a second-yearpupil.我的侄子是一个小学二年级的学生。

This cleverpupillearns things quickly.这个机灵的学徒学东西很快。Thepupiladjusts its size according to the intensity of external light.瞳孔会根据外界光线强弱调整大小。