useful
释义
adj.有用的；有益的
出现位置
小学-译林版 · 译林版六年级上册英语 · Unit 7 Protect the Earth
例句（20 条）
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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。
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It can be useful to write a short summary of your argument first.
先把你的论点纲要写下来可能会有帮助。
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Your local library will be a useful source of information.
你们当地的图书馆就是很好的资料来源。
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Extra blank paper will probably come in useful.
额外的空白纸可能用得着。
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My mobile phone is extremely useful.
我的手机极为有用。
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Every part of the pig is useful.
猪身上的每个部位都很有用。
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Having your own computer is very useful.
自己有一台计算机用处很大。
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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。
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Photos make useful teaching aids.
照片可以成为有用的教具。
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She is going to recycle useful rubbish.
她打算去回收有用的垃圾。
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He offered some useful advice.
他提出了一些有益的建议。
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Overall, this is a very useful book.
总的来说，这是一本很有用的书。
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This information could prove useful.
这条信息往后也许有用。
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In business a poker face can be very useful.
在生意场上，不露声色会非常有用的。
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The research has yielded useful information.
这项研究提供了有用的资料。
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I've made some useful contacts in journalism.
我在新闻界结交了一些有用的人。
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Videoing students can be a useful teaching exercise.
给学生录像可以成为有用的教学活动。
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This technique is useful but it has its limitations.
这种技术实用，但也有局限性。
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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。
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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。