He offered some useful advice.
他提出了一些有益的建议。
Photos make useful teaching aids.
照片可以成为有用的教具。
I've made some useful contacts in journalism.
我在新闻界结交了一些有用的人。
Videoing students can be a useful teaching exercise.
给学生录像可以成为有用的教学活动。
This technique is useful but it has its limitations.
这种技术实用，但也有局限性。
Some drugs kill off useful bacteria in the user's body.
某些药物会杀死服用者体内的有益细菌。
Hypnotherapy can be useful in helping you give up smoking.
催眠疗法在帮助你戒烟方面可能有用。
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。
It was a collaboration that produced extremely useful results.
这是一次带来极其有益的成果的合作。
From this chastening experience he learned some useful lessons.
从这次惩戒性的经历中，他得到了一些有用的教训。
The memory expansion cards are useful adjuncts to the computer.
内存扩充卡是计算机很有用的附件。
The document provided a springboard for a lot of useful discussion.
这份文件引发出许多有益的讨论。
The drug will be useful to hundreds of thousands of infected people.
这种药物将会对成千上万感染者有用。
All of these are useful breeds whose potentiality has not been realized.
所有这些都是有益的品种，其潜力尚未被认识到。
At the end of this chapter there is a select bibliography of useful books.
本章末尾附着有用书籍的精选书目。
"For heaven's sake!" Dot expostulated. "They're cheap and they're useful."
“看在老天的份上！”多特反驳道。“他们便宜而且他们有用。”
They produced two reports, neither of which contained any useful suggestions.
他们提交了两个报告，都没有任何有用的建议。
No doubt such robots would be very useful in the homes of the able-bodied, too.
毫无疑问，这样的机器人在健全人的家里也会非常有用。
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。
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。
The Shakers believed that furniture should be plain, simple, useful, practical, and of sound construction.
震颤派教徒认为家具应当朴素、简单、有用、实际，且构造很好。
It concludes with a very useful summary of key points, with cross-references to where each key point is dealt with in the book.
它在结论中对要点进行了非常有用地总结，并标出了书中讲述每个要点的参照章节。
什么是有用片段？
蝙蝠是有用的动物吗？
牛是有用的动物。
机器人会有用吗？
A tripod will be useful to align and steady the camera.
三脚架会有助于对齐稳住照相机。
The figures are a useful guideline when buying a house.
买房时这些数据很有参考价值。
Brick rubble is useful as the base for paths and patios.
碎砖可用作道路和天井的基石。
Her specialist input to the discussions has been very useful.
她在这些讨论中提供的专家建议很有助益。
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