Definitions

[1] adj. 有用的, 有益的

[2] [机] 有用的, 有效的

[ 'ju:sful ]

1. Speaking English is useful.
   说英语很有用。
2. English is useful in commerce.
   英語在商業中很有用。
3. English is useful in diplomacy and tourism.
   英語在外交和旅遊業方面很有用。
4. This is a useful book and, what is more, it is not expensive.
   這本書很實用，而且價錢也很相宜。
5. You'll find this map very useful.
   你會發現這張地圖非常有用。
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6. Edison invented many useful things.
   愛迪生發明了許多有用的東西。
7. Read such books as will be useful in later life.
   读这样的书会对今后的生活会有用。
8. My dictionary is very useful.
   我的字典非常有用。
9. An uncle of mine gave me some useful advice.
   我的一个叔叔给我了一些有用的建议。
10. Electricity is very useful.
    电很有用。
11. Horses are useful animals.
    马是种很有用的动物。
12. The horse is a useful animal.
    马是种很有用的动物。
13. He found that the things he had studied in school were not useful in the business world.
    他發現他上學學的東西，在商界根本派不上用場。
14. None of his advice was very useful.
    他的意見都不是非常有用。
15. She gave us some useful information.
    她給了我們一些有用的訊息。
16. When you go abroad, it is useful to learn at least some polite phrases in the local language.
    你出国的时候学一些当地的礼貌用语还是很有用的。
17. This website is very useful.
    这个网站很有用。
18. Copy-and-paste is very useful.
    复制/粘贴是很有用的。
19. Iron is a useful metal.
    铁是个有用的金属。
20. Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful.
    宗教在一般人的眼中是真理，在智者的眼中是謊言，而在統治者的眼中則是一種工具。
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