| 1. | It was a productive and fertile period . 这是一个硕果累累的时期。 |
| 2. | India is a rich productive country . 印度是一个物产丰富的国家。 |
| 3. | Timothy is exceptionally leafy and productive . 梯牧草特别多叶,且生长快。 |
| 4. | Science and technology are no.1 productive forces . 科学技术是第一生产力。 |
| 5. | They left the fields productive only of weeds . 他们离开了只生长野草的田地。 |
| 6. | Their productive cycle covers several decades . 它们的生产周期可延续几十年。 |
| 7. | It had always been productive and rich in gold . 它一直物产丰富,而且富有黄金。 |
| 8. | Agroecosystems are often highly productive . 农业生态系统通常具有很高的生产力。 |
| 9. | The grassland soils are generally the most productive . 草原土壤通常都是最肥沃的。 |
| 10. | Farming is productive labor . 耕作是有生产价值的劳动。 |