| 31. | The development of things depends fundamentally on internal causes. |
| 事物的发展基本上是由内因决定的。
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| 32. | It achieved a remarkable development in the nineteenth century. |
| 它在19世纪得到了显著的发展。
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| 33. | It is impossible to forecast the future development of…. |
| 预测…的未来发展情况是不可能的。
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| 34. | It owes its development to…. |
| 它的发展归功于…
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| 35. | Oculists find that a child's eyes do not reach full development until about twelve years of age. |
| 眼科专家发现儿童的眼睛要到大约12岁才发育完全。
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| 36. | The art received its greatest development in that period. |
| 这种艺术在那段时期获得最大的发展。
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| 37. | It attained a high development in ancient China. |
| 在古代中国它已达到高度发展的程度。
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| 38. | The development of photographic films requires a darkroom. |
| 冲洗照相底片需要暗室。
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| 39. | The laws of historical development will assert themselves. |
| 历史发展的规律是不可抗拒的。
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| 40. | set forward the development of production. |
| 促进生产的发展。
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