The building has outlived its usefulness.
这座楼房已超过使用年限了。
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。
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。
I was persuaded of the usefulness of his new device.
我相信了他的新装置的实用性。
Remember, the usefulness of a cup is in its emptiness.
记住：杯子的用处正在于它的空。
Self-control is essential to happiness and usefulness.
自制力是获取幸福和成就事业不可或缺的能力。
Each type of motor has its particular field of usefulness.
每种型号的电动机都有其特定的适用范围。
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。
Its four features represent its high academic level and usefulness.
该书有四个显著特点，体现了它的学术和应用价值。
Any comments you would like to make about the usefulness of this paper?
关于这篇文章的有用性，你有什么评论？
The new board is to meet quarterly; its usefulness will be reviewed after a year.
新委员会每季举行一次会议；委员会的效用将在一年后复查一下。
The application has shown the usefulness and the practical value of this system.
实际应用表明了该系统的有效性和实用价值。
It has proven its usefulness in pharmaceutical, food and environmental analysis.
它已经在医药，食品和环境分析里证明它的用途。
The value of network supervision is to protect the Internet's usefulness for people.
网络监管的价值在于保护互联网对人的有益性。
The intelligent fibers have an important position and special usefulness in the materials field.
智能纤维在材料领域中具有重要的地位和独特的用途。
有效果比有道理更重要。
Primary school English; Interest; Usefulness; Strategy.
小学英语；趣味性；有效性；策略。
Usefulness, however, is not always the primary factor that determines wide-scale adoption.
然而，有用性通常并不是决定能否得到广泛采用的主要因素。
Usefulness, however, is not always the primary factor that determines wide-scale adoption.
然而，有用性通常并不是决定能否得到广泛采用的主要因素。
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