| 1. | I have a useful contact in new york . 我在纽约有个有用的人可以联系。
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| 2. | This new dictionary is very useful to me . 对我来说这本新词典很顶事。
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| 3. | They were discarding something useful . 他们丢掉了某些有用的东西。
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| 4. | It is useful to think classically . 根据经典的观点来思考问题是有用的。
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| 5. | This adventure was a useful lesson . 这番周折给我上了有益的一课。
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| 6. | His article contains much that is useful . 他的文章里有很多有用的东西。
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| 7. | Polymers are fabricated into useful articles . 聚合物加工成有用的制品。
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| 8. | It is one of the most useful lessons of life . 这是人生最有益的鉴戒之一。
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| 9. | I gave that very useful person to the world . 我向社会贡献了这个有用的人。
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| 10. | It is useful to have a convenient supermarket . 附近有家超级市场实在方便。
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