付款事务需要在信用卡有效的状态下进行。

The payment transaction task will be based on the status of the validity of the credit card task.

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本文提出了一种有效的状态和参数的联合估计方法。

An efficient method for the estimation of both the state and unknown parameters is presented in this paper.

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这会将数据库置于一致的有效状态。

This places the database into a consistent valid state.

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Of course, the cyclic steps that we've taken to do this apply not just for breaking down reactants and product into the elements in their standards states, but of course we could also look at whole sets of reactions and write cycles as well, right.

当然，我们这里用的循环的,步骤不仅仅在把生成物,和反应物拆成其标准状态下,的元素时有效,我们也可以研究整个一系列,反应并写出相应循环。

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