At the production level, in the United States the conversion was virtually complete by 1930.
事实上,从生产水平方面来讲,在美国直到1930年才完成这一转变。
The communication mediums used to complete the purchase are not included at this level but are introduced at the business process level.
用于完成购买的通讯形式不包括在这个层次,但是会在业务处理层次引入。
Complete recovery can be done at the database level or data file and tablespace level.
完全恢复可以在数据库级或数据文件和表空间级上完成。
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