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