创建和使用包含业务时间的表。
使用系统时间和业务时间。
业务时间跟踪某些业务条件(比如利率)的生效日期。
Business time tracks effective dates of certain business conditions, such as interest rates.
It didn't-- if you needed more time to get some business done you'd have to borrow, but you'd only have to pay 1% a year.
如果你需要更多时间来完成业务,你需要借款,而只需付1%的年利息
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