That is why the book discusses ways to provide alternative co-existent behaviors and explains how to bridge them, when necessary.
这也是为什么本书讨论了提供两种模式并存的方式，也解释了必要时如何在两者之间取得平衡。
The separation of several co-existent elements was investigated and easy and quick determination method of super trace Iridium was established based on it.
确定了萃取和反萃取的条件，考查了多种共存元素的分离情况，并在此基础上，制定了岩石矿物中超微量铱的简便、快速的测定方法。
The separation of several co-existent elements was investigated and easy and quick determination method of super trace Iridium was established based on it.
确定了萃取和反萃取的条件，考查了多种共存元素的分离情况，并在此基础上，制定了岩石矿物中超微量铱的简便、快速的测定方法。
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