There are doubts about the usefulness of these tests.

这些试验是否有用，人们有所保留。

Man early learned the usefulness of weapons.

人类很早以前就知道了武器的用处。

If an interactive computer screen is to match a whiteboard in usefulness, it must be viewable from arm's length as well as from across a room.

如果一个交互式计算机屏幕要在实用性上与白板相匹配，它必须在手臂长度范围和横跨房间范围内是可视的。

Whereas local collaborations sometimes persist past the point of usefulness, because of social or academic obligations, international ones can be cultivated and dropped more freely.

尽管由于社会或学术义务，地方合作有时会超出其有效性，但国际合作可以得到发展和放宽。

An experimental version of the traditional scholarly methods course was designed to raise students' consciousness about the usefulness of traditional learning for any modern critic or theorist.

传统学术方法课程的实验版本旨在提高学生对传统学习对任何现代批评家或理论家有用性的意识。

The building has outlived its usefulness.

这座楼房已超过使用年限了。

Affected industries clung to the former wildlife policy of valuing individual species according to their economic usefulness.

受影响的行业坚持以前的野生动植物政策，即根据其经济价值对单个物种进行评估。

It is of the greatest usefulness.

它是极有用的。

A. Ideas of immediate usefulness.

立即有用的想法。

His usefulness was over.

他不再有用了。

This is also the key to their usefulness.

这也是质数非常有用的关键。

Modifying text.c for command-line usefulness.

修改text . c使命令行有用。

These mistakes sap XML of its power and usefulness.

这些错误损害了 XML 的能力和有效性。

XJConf has limited usefulness in this context.

XJConf在此方面功能有限。

For language learning, say, the usefulness is obvious.

这对学习语言等显然是非常有用的。

The usefulness of these therapies is now under threat.

这种疗法的效用现在受到威胁。

They can also rate apps according to their usefulness.

它们还根据其实用程度给应用进行排名。

Chess programming, however, has not lost its usefulness.

然而，国际象棋程序并没有就此止步。

But in the present context it has outlived its usefulness.

但在现在的环境下已经失去了用途。

Yet it is this usefulness that makes the company a success.

正是由于它实用，这家公司才获得了成功。

But the research casts doubt on the usefulness of such products.

但是，一项最新研究却对这些食品的有效性提出了置疑。

It was pretty cool before, but of limited usefulness for me.

虽然从前它也不错，但于我却用处不多。

They will of course maintain their usefulness... It's there.

他们理所当然将保持其效用。

Nature admits of no hierarchy of beauty or usefulness or importance.

大自然不会以美丑、用处以及重要性来给动物分等级。

He sees French as a tradition that has outlasted its peak usefulness.

在他看来，法语是一种早已过了其实用性全盛期的传统。

But it may have a number of tests that have outlived their usefulness.

但是可能有许多测试的生命长过其有效时期。

When I started running outside I halved the usefulness of the gym.

当我开始在室外跑步时，健身房的功效就减半了。