apple of sb's eye：某人珍爱的人（或）物

e.g. Ingrid is the apple of Larry's eye, but she hardly knows he exists.

拉里把英格丽德视作自己的心肝宝贝，可英格丽德却压根儿就不知有他这么个人。

e.g. The car in the show window is the apple of my eye.

我非常喜欢陈列在橱窗里的那辆汽车。