换句话说，一个符合给定层规范的工具可以从那些符合任一相同或低于它所在层规范的工具中导入模型——在没有丢失信息的情况下。

In other words, a tool compliant to a given level can import models — without loss of information — from tools that were compliant to any level equal to or below its own.

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请记住，这些数字只是在一个非常普通的环境中，使用给定的事务组合的情况下取得的。

Please remember that these Numbers are simply one data point, obtained for a given transaction mix in a very modest environment.

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在大多情况下，对于给定的聚合物特性，有一个分子质量的范围使得这种聚合物能够理想地应用。

In most instances, there is some molecule weight range in which a giver polymer property will be optimum for a particular application.

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