All communication systems serve a purpose, a pragmatic function of some sort.

所有的通信系统都有一个目的，某种实用的功能。

youdao

Rather than just lying in the drawer, your old phone will now serve a purpose.

现在你的手机不再静静地躺在你的抽屉里了，可能正在为某人服务呢。

youdao

Thereafter, it did not serve a purpose to publish the category or the year on our website.

此后，它没有明确的目的来发布类别或我们网站上的一年。

youdao

So,do they serve a purpose in reducing physical pain?

VOA: special.2009.08.18

Sometimes they serve a purpose.

有些能达到阐述的目的

耶鲁公开课 - 基础物理课程节选

This can be a problem even though earwax appears to serve an important purpose.

VOA: special.2010.03.31

The Pentagon, however, maintains that landmines still serve a purpose in safeguarding lives in combat.

ECONOMIST: The new convert

It may not be all neat and tidy, but even accidental viral marketing can serve a purpose.

FORBES: Connect

To say men shouldn't marry career women is archaic, and doesn't serve a purpose other than invite confrontation.

FORBES: Magazine Article