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| 递阶结构 | |||
| 统属结构 | |||
| 层次结构 | |||
| 层次［分级］结构 | |||
| 等级式结构; 分层构造 | |||
| 分级结构; 分层结构 | |||
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| 等级式结构; 递阶结构; 层次结构; 分级结构; 分层构造 | |||
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hierarchical structure : 27 phrases in 12 subjects |
| Animal husbandry | 1 |
| Automatic control | 1 |
| Cartography | 1 |
| Computer networks | 2 |
| Desert science | 1 |
| Ecology | 1 |
| Electronics | 2 |
| Information technology | 2 |
| Mathematics | 1 |
| Space | 3 |
| Technology | 10 |
| Telecommunications | 2 |
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