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| 31. | life span development |
| 毕生发展 |
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| 32. | depth-span ratio |
| 高跨比 |
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| 33. | memory span method |
| 记忆广度法 |
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| 34. | healthy life-span |
| 健康寿命 |
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| 35. | Memory Span Test |
| 记忆广度测验 |
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| 36. | multiple span bridge |
| 多孔桥 |
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| 37. | mid-span moment |
| 跨中弯矩；跨中力矩 |
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| 38. | single span footbridge |
| 单跨行人天桥 |
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| 39. | multiple beam span |
| 多梁桥跨 |
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| 40. | control drum span |
| 控制鼓转幅 |
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