C2 起作用
to have a use
These small village shops serve a very useful purpose. 村里的这些小商店非常有用。
These tall herbs serve a dual purpose of providing nectar as well as a place for the butterflies to perch.
School uniforms also serve a useful purpose by identifying who belongs on campus.
Do these ridiculous rules serve any purpose at all?
Public information advertisements serve a valuable public purpose.
See also: purpose