1.the apple of one's eye 掌上明珠

She is the apple of her father's eye.
她是父亲的掌上明珠。

2.a small potato 无足轻重的小人物

Bob is a small potato in my classroom.
鲍勃在我们班很不起眼。

3.a big fish 大人物

William is a big fish in his town.
威廉在他们镇上是个响当当的大人物。