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| база данных с иерархической структурой | |||
| иерархическая база данных | |||
| 英语 词库 | |||
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| A database structured in a tree/root or parent/child relationship (Each parent can have many children, but each child may have only one parent) | |||
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hierarchical database : 9 短语, 6 学科 |
| 信息技术 | 4 |
| 技术 | 1 |
| 数据库 | 1 |
| 编程 | 1 |
| 计算 | 1 |
| 计算机网络 | 1 |