然而，科学家们对这些生理特征的演化顺序并不明了。
Scientists weren't clear about the order in which these features evolved, however.
并依据各单元的矿物成分、化学成分、微量元素含量的变化，重新厘定了岩浆的演化顺序。
And according to the mineral composition, chemical composition and trace element content, the evolution series of the magma is redefined.
而决定这一切的是各个池塘在其演化过程中所经历的不同事件，比如物种被引入该池塘的顺序。
That was determined largely by specific events in each ponds' history, such as the order in which species were introduced.
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