1·The tourist office operates a useful room-finding service.
这个旅游办事处开办了实用的找房业务。
—— 《柯林斯英汉双解大词典》
2·The newsletter is a useful channel of communication between teacher and students.
发简讯是沟通师生的有益渠道。
—— 《牛津词典》
3·His no-inflation bill serves as a useful counterweight to proposals less acceptable to the committee.
相对于那些不太为该委员会接受的议案来说，他的无通货膨胀法案可作为一个有益平衡。
—— 《柯林斯英汉双解大词典》
4·This accident affords us a useful lesson.
这个事故为我们提供了有益的教训。
—— 《新英汉大辞典》
5·"They provide a useful service," said Flack.
弗拉克说：“他们提供有用的服务。”
6·It has many omissions; even so, it is quite a useful reference book.
那本书有许多遗漏之处，即使如此，尚不失为一本有用的参考书。
—— 《新英汉大辞典》
7·They are also becoming a useful tool for firefighters, helping them find and fight wildfires.
它们也正在成为消防员的一个有用工具，帮助他们发现和扑灭野火。
8·Unfortunately, that conclusion puts too much weight on a useful, but flawed and incomplete, statistic.
不幸的是，这一结论对这个有用但有缺陷、不完整的统计数字给予了过多的重视。
9·They can provide a useful overview—an aerial map, as it were, to familiarize you with the main landscape features to be encountered during a course.
它们可以提供一个有用的概览——一个航拍图，可以让你熟悉课程中遇到的主要景观特征。
10·As Professor O'Keefe pointed out, "This research provides a useful direction for organizations whose products and services call for integrated and creative solutions."
正如奥基夫教授所指出的：“这项研究为那些产品和服务需要完整综合的、创造性解决方案的组织提供了一个有用的方向。”