The express runs every day between Beijing and Shanghai.
在北京与上海之间每天都有快车行驶。
Both queries express the same semantics but the second one runs about 9% faster on our system and database configuration.
这两个查询都表达了相同的语义,但是在我们的系统和数据库配置中,第二个查询运行起来要快9%。
For these runs, a reliability level of express non-persistent was used.
运行测试时,我们使用了极速非持久性可靠性水平。
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