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1·The school has over 850 pupils.

这所小学有850多名学生。《牛津词典》

2·The sick man's pupils were dilated.

病人的瞳孔放大了。《柯林斯英汉双解大词典》

3·Her pupils were dilated.

她的瞳孔扩大了。《牛津词典》

4·How many pupils does the school have?

这所小学有多少学生？《牛津词典》

5·Pupils are streamed for French and Maths.

学生上法语和数学课时按能力分成小组。《牛津词典》

6·The music teacher really pushes her pupils.

这位音乐老师认真督促她的学生。《牛津词典》

7·The school began in 1920, with only ten pupils.

这所学校创建于1920年，当时只有十名学生。《牛津词典》

8·Most pupils learn (to play) a musical instrument.

多数小学生都学习演奏乐器。《牛津词典》

9·At night, the pupils dilate to allow in more light.

晚上，瞳孔放大以便让更多的光线射入。《柯林斯英汉双解大词典》

10·The private schools cream off many of the best pupils.

私立学校挑走很多最优秀的学生。《柯林斯英汉双解大词典》

学生

1·How many pupils does the school have?

这所小学有多少学生？《牛津词典》

2·The music teacher really pushes her pupils.

这位音乐老师认真督促她的学生。《牛津词典》

3·The school began in 1920, with only ten pupils.

这所学校创建于1920年，当时只有十名学生。《牛津词典》

4·The private schools cream off many of the best pupils.

私立学校挑走很多最优秀的学生。《柯林斯英汉双解大词典》

5·The school has come under attack for failing to encourage bright pupils.

这所学校因未能鼓励聪明学生而受到非难。《牛津词典》

瞳孔

1·Most bear's eyes have round pupils.

大多数熊的眼睛有圆形的瞳孔。

2·Its pupils grow so much.

它的瞳孔长很大。

3·His pupils are brown.

他的瞳孔是棕色的。

4·Chinese Mantis eyes have pseudo pupils that seem to follow you around, but the eyes do not really move.

中国螳螂的眼睛有“假冒的瞳孔”，好像一直盯著你看，但其实它们的眼睛并没有动。

5·The old man's eyelids, pale and thin like rice paper, flickered. For an instant, his pupils seemed to center on the young man's face, then drifted away.

老人苍白消瘦得如同米纸一般的眼睑微动了一下，他的瞳孔似乎在一瞬间集中到这位年轻男子的面孔上，然后慢慢黯淡了下去。

(1)exit pupil出射光瞳；后透光孔

(1)pupil dilation瞳孔扩张；瞳孔放大