There are doubts about the usefulness of these tests.
这些试验是否有用，人们有所保留。
The building has outlived its usefulness.
这座楼房已超过使用年限了。
1.用途;实用性
2.有效性
3.效用
4.作用
5.与人为善
1.用途;实用性
2.有效性
3.效用
4.作用
5.与人为善
1.the fact of being useful, or the ability to be useful in particular situations
1.Raise a finance report the usefulness of the contents, have to the point increment publish several of accountancy's information.
提高财务报告内容的有效性，必须重点增加披露几个方面的会计信息。
2.More than any other testing framework, JUnit has driven developers to understand the usefulness of tests, especially of unit tests.
JUnit超过了其他测试框架，推动开发人员理解了测试尤其是单元测试的用途。
3.You're in survival mode, just trying to make it through another day. And that limits your usefulness in ministry!
你处于生存模式中，只是尽力去捱过一天，这就在制约了你的效率。
4.It noted the usefulness of the work of the SCP and the open forum in March 2006, which had led to a constructive exchange of views.
它指出，SCP的工作以及2006年3月举行的公开论坛非常有用，让各方建设性地交换了意见。
5.Readers will often read content diagonally to determine its usefulness before giving it a proper read.
读者经常会阅读首尾内容来决定文章是否对自己有用，然后决定是否通读。
6.Familiarity with religious or historic texts connected to any given site is important, he said, but their usefulness can vary.
他说，熟悉任何已知的场所的宗教和历史的文献是很重要的，可是其中有很多材料可能是无用的。
7."If one can show its usefulness in its present size, the argument for its enlargement would be much stronger, " he said.
“如果我们展示出，该基金在现有规模下就相当有用，那么其扩充的论据就会强有力得多，”他表示。
8.When he learned of eht usefulness of foreign languages, he took to studying English with great zeal.
当他知道外语的用处后，就开始以极大的热情学习英语。
9.Despite this usefulness, however, finding that perfect pair of men's jeans is never easy.
然而除了这些无关紧要的因素，选择合适的男士牛仔裤从来就不是件容易的事。
10.The usefulness of the two bottles of wine, he lied to participate in the meeting was the last meal, is used for official reception.
对这两瓶酒的用处，他谎称是上次参加会议的餐费，是用于公务接待的。