1. 实体化：可定义一个缩减块(reduce block)来缩减视图的初始映射数据. 视图可被实体化(materialized)以提高查询的性能. 分布式实体化(materialization)已经可用,不过即将重写.
1. To the surprise of many on the political left and most pundits, the clamor for a big expansion of government has not materialized.
2. Chavez said he had favored the creation of a similar entity back in 1999, which failed to be materialized due to lack of enough support across the region.
3. But the vision is far from being materialized given the big disparity in monetary and foreign exchange reserves policies in countries in the region.
4. Nearly all of the artifacts were collected by former mayor Stephen Reed, who dreamed of building a Wild West museum in Harrisburg that never materialized.
5. Plans carefully laid at the beginning of a conflict can do more to shape the eventual outcome than efforts taken after the threat has materialized.
6. Though Fay never materialized into a hurricane, downpours along its zigzagging path have been punishing and deadly.
7. All political rights have to be materialized at the individual level with personal integration and dignity as the foremost components.
8. Tanks haven't materialized when a wrapper doesn't make it into the garbage can.
9. A fourth round originally planned for September never materialized after Pyongyang said Washington must first drop what it called a hostile policy.
10. A fourth round planned before the end of September never materialized after three inconclusive rounds in Beijing.