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| 年龄结构指畜群中不同年龄家畜(尤其母畜)组合的比例和情况 | |||
| 年龄分布; 年龄结构 | |||
| 年龄构成 | |||
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| 人口年龄结构 | |||
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age structure : 4 phrases in 3 subjects |
| Business | 1 |
| Economy | 2 |
| Technology | 1 |
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