他们把数据库当成对象使用，并疑惑性能为什么如此之差。
They wrap the database in objects and wonder why the performance is so poor.
管线钢内部的微观组织的组成对材料的使用寿命和性能有着重要的影响。
Composition of Pipeline steel's microstructure has important influence to material service life and performance.
从使用者的角度讲，要用最小的力气、最简便的方法来完成对机器的操纵。
The user, with only a little effort and in a simple way, run the machine.
大部分工作已经完成对数据的使用和低功耗优化。
Much work has been done on optimising for low data usage and power consumption.
大部分工作已经完成对数据的使用和低功耗优化。
Much work has been done on optimising for low data usage and power consumption.
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