useful

1. He offered some useful advice.: 他提出了一些有益的建议。

2. Photos make useful teaching aids.: 照片可以成为有用的教具。

3. My mobile phone is extremely useful.: 我的手机极为有用。

4. Overall, this is a very useful book.: 总的来说，这是一本很有用的书。

5. This information could prove useful.: 这条信息往后也许有用。

6. In business a poker face can be very useful.: 在生意场上，不露声色会非常有用的。

7. The research has yielded useful information.: 这项研究提供了有用的资料。

8. I've made some useful contacts in journalism.: 我在新闻界结交了一些有用的人。

9. Videoing students can be a useful teaching exercise.: 给学生录像可以成为有用的教学活动。

10. This technique is useful but it has its limitations.: 这种技术实用，但也有局限性。

11. 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。

12. 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。

13. 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。

14. 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。

15. 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。

16. 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。

17. It was certainly useful to have her there to chauffeur him around.: 有她在那儿为他开车肯定是有用的。

18. 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。

19. 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。

20. 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。

21. "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。”

22. Painkillers are very useful in small amounts to bring your temperature down.: 小剂量的止痛药对于降低体温非常有用。

23. 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。

24. 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。

25. He's a very useful player.: 他是个很棒的运动员。

26. He might be useful to us.: 我们也许用得上他。

27. Having your own computer is very useful.: 自己有一台计算机用处很大。

28. These experiments serve no useful purpose.: 这些实验没有任何实际意义。

29. Extra blank paper will probably come in useful.: 额外的空白纸可能用得着。

30. She has ten years' useful experience behind her.: 她有十年的经验，能派上用场。

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