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| base de données de type hiérarchique | |||
| base de données hiérarchique | |||
| 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 : 1 短语, 1 学科 |
| 计算 | 1 |