Definition: to be useful as something Level: C1
这个盒子可以当作一个玩具箱。
This box can ___serve as a toy box.
这是一部非常有趣的电影，但它也服务于教育目的。
It's a very entertaining movie, but it also ___serves an educational purpose.
那些讨论只是加深了她的恐惧。
Those discussions only ___served to reinforce her fears.
