源操作数和目的操作数的顺序。
在所有指令中，先是源操作数，然后才是目的操作数。
In any instruction, source comes first and destination follows.
此方法的目的就是：将目前所显示的数值存储到此累加器、存储特定的操作以及为了下一个操作数的输入而重置显示。
The purpose of this method is to store the currently displayed number into the accumulator, to store the specified operation as well, and to reset the display for input of the next operand.
您当然会使用副本作为备份，且在希望使用一个新程序而又不将操作数据置于风险中时将数据副本用作测试目的。
You would certainly use copies for backup and also for test purposes where you want to try out a new program without putting your operational data at risk.
分析和研究了ODS层的理论，并通过操作数据存储层的引入实现减轻业务系统负担和为数据仓库系统提供一个统一的数据环境的目的。
It analyses and studies the theory of ODS. It also achieves the goal of lightening the burden of business system and providing a unified data environment through the use of ODS.
分析和研究了ODS层的理论，并通过操作数据存储层的引入实现减轻业务系统负担和为数据仓库系统提供一个统一的数据环境的目的。
It analyses and studies the theory of ODS. It also achieves the goal of lightening the burden of business system and providing a unified data environment through the use of ODS.
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