Partly because the classes usually do more than you actually need, they impose more overhead than a class designed for one purpose only.

其中一部分是因为类能做的超出了您真正需要的，与只为一种用途设计的类相比，它们会产生更多的开销。

youdao

The key thing to realize here is that these "hateful beasts" exist for one purpose and one purpose only: to move data from one place to another.

在这里需要认识到的关键事情是，这些“令人讨厌的东西”存在的一个也是惟一的理由是：把数据从一个地方移动到另一个地方。

youdao

All the research, planning, reviewing, test automation development, and maintenance are done for one purpose: to enable us to find bugs in the software.

所有的研究、计划、审阅、测试自动化开发，和维护都为了一个目的：使我们找到软件中的缺陷。

youdao

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

VOA: standard.2010.03.22

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

I'm sure they sold it in various forms, but one of the most popular was for this purpose.

我确信他们出售各种用途的橄榄油,但最普遍的还是作为清洁工具

耶鲁公开课 - 古希腊历史简介课程节选

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

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

From a quarter-mile away it was clear she was built for one purpose, to explore the far corners of our planet via the high seas.

FORBES: The Real Deal... Mike Horn Takes Young Explorers to the Far Corners of the Planet

Much of the problem is that older circuit-switched networks were designed for one purpose: to connect two callers by opening up a dedicated line between them.

FORBES: Grand illusions