This gun is designed for one purpose – it's basically to kill people.

设计这把枪只有一个目的–主要用于杀人。

《柯林斯英汉双解大词典》

Each view accomplishes one purpose.

每一个视图都满足了一个目标。

youdao

You listen with only one purpose: to help him or her to empty his heart.

你倾听只为一个目的：帮助他或他清空心灵的负担。

youdao

But every year,it comes alive for just one purpose.

VOA: standard.2010.03.22

So I always regard one purpose of this class to help hapless Yale students in their dating strategies.

我一直都觉得一门课还有个目的,就是教耶鲁的倒霉蛋们怎么约会

耶鲁公开课 - 博弈论课程节选

Nutrients get broken down into several classes and these are the constituents of food that your body uses for one purpose or another.

营养素这个问题需要花几节课来讨论,它们是食物的组成要素,供给身体吸收,支持身体机能运转

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Most importantly, as BNE explains below, that one purpose is to help people who really need it.

FORBES: Rebel With a Cause: An Interview with BNE

Consequently, one purpose of the experiment was to provide a baseline against which future QoS enhancements can be measured.

CNN: A visit to Stanford's Internet2 GigaPoP

They exist to produce, market, and ship great games ultimately for one purpose.

FORBES: Move up http://i.forbesimg.com t Move down