serve a purpose

US /sɜːrv ə ˈpɜːr.pəs/
UK /sɜːrv ə ˈpɜːr.pəs/
"serve a purpose" picture
1.

有用途, 有用

to be useful or to have a function

:
Does this old tool still serve a purpose?
這個舊工具還有用嗎?
Every part of the machine must serve a purpose.
機器的每個部分都必須有其用途