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| 1. | They found the remains of a Rebel base, but they estimate that it has been deserted for some time. |
| 他们找到残余的叛军基地，但他们估计已弃置许久 |
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| 2. | statistics are not available, then the estimator uses the number of extents occupied by the table to estimate |
| 如果表统计数据是无效的，那么估计器使用占用的表扩展来估计基本的行集数。 |
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