| 1. | The second part shows the estimated costs of the query
第二部分展示了该查询的估算成本。 |
| 2. | The estimated costs are cost units that the optimizer uses to compare query plans
估算成本是优化器用来比较查询计划的成本单元。 |
| 3. | Another factor that must be considered when enterprises decide on prices is cost
企业制定价格必须考虑成本因素，必须正确地估算成本。 |
| 4. | A query with higher estimated costs generally takes longer to run than one with lower estimated costs
与具有较低估算成本的运行相比，具有较高估算成本的查询的运行时间通常更长一些。 |
| 5. | The optimizer chose this query plan because the estimated cost for its execution was the lowest among all the evaluated plans
优化器将选择该查询计划，因为其执行的估算成本是所有被估计划中最低的。 |
| 6. | If the transaction isolation mode is repeatable read , then the optimizer would base its choice purely on the estimated costs
如果事务隔离模式是可重复读（ repeatable read ） ，那么优化器会将其选择完全基于估算成本。 |
| 7. | If value is set to 2 , the optimizer would uses estimated costs to determine an execution plan regardless of the transaction isolation mode
如果将其值设置为2 ，优化器就会使用估算成本来确定执行计划，而不管事务隔离模式如何。 |
| 8. | If the value is set to 0 , then the optimizer chooses index scans over table scans if appropriate indexes exist , without even considering the estimated costs
如果将其值设置为0 ，那么当存在合适的索引时，优化器就选择索引扫描而非表扫描，甚至不考虑估算成本。 |
| 9. | There is a big push to use online decision - support tools to track , manage and justity costs . don ' t get blind - sided by new requirements for situation analyses
有一个巨大的推动器，利用在线决策支持工具来跟踪，管理和估算成本。不要盲目片面的，依据新的需求进行情况分析。 |
| 10. | Given that the additional anti - warming steps that might be taken aren ' t yet known ? and so their net costs are impossible to state ? it is premature to dismiss them as “ phenomenally more expensive
事实上对抗全球暖化的其他方案目前还没出现，根本无法估算成本，现在就说绝对要花更多钱来驳斥这些方案，是草率、不负责任的。 |
