serve a purpose

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

役に立つ, 目的を果たす

to be useful or to have a function

:
Does this old tool still serve a purpose?
この古い道具はまだ役に立ちますか
Every part of the machine must serve a purpose.
機械のすべての部品は目的を果たす必要があります。