| 1. | Clay contains available nutrient elements . 粘土会有有用的营养元素。 |
| 2. | I have a useful contact in new york . 我在纽约有个有用的人可以联系。 |
| 3. | He had some motive in telling this fable . 他讲这寓言故事是有用意的。 |
| 4. | The medical book seemed more promising . 看来这本医学书更有用一些。 |
| 5. | They were discarding something useful . 他们丢掉了某些有用的东西。 |
| 6. | It is useful to think classically . 根据经典的观点来思考问题是有用的。 |
| 7. | In some cases the slag can be disposed of usefully . 有时炉渣能有用处。 |
| 8. | His article contains much that is useful . 他的文章里有很多有用的东西。 |
| 9. | Polymers are fabricated into useful articles . 聚合物加工成有用的制品。 |
| 10. | Other significant development were taking place . 其他有用措施已被采用。 |