Usages of multiple granularities of time make it very complex to compute the finite closure of attributes.
由于多时间粒度的使用，使得有限属性闭包问题变得非常复杂。
However, in the strong totally ordered temporal scheme, the introduction of multiple time granularities makes it more difficult to solve the membership problem.
由于强全序时态模式中多时间粒度的使用，使其成员籍问题的解决变得更加复杂。
Constraints involving multiple time granularities exist in many temporal database applications.
在许多时态数据库应用中，都存在着涉及多时间粒度的约束。
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