Correlate Mrna's Recent Investigations Shown Concentrations Synthesis Equally

意群训练： However ，recent investigations have shown that the concentrations of most mRNA's correlate best ，not with their synthesis rate ，but rather with the equally variable rates at which cells degrade the different mRNA's in their cytoplasm .

标志： However , recent investigations have shown that the concentrations (of most mRNA's) correlate /best, not with their synthesis rate , but rather correlate best with the equally variable rates (at which cells degrade the different mRNA's in their cytoplasm)/.

译文： 然而，近来的调查 显示 ，（大多数的mRNA的）浓度 /并不是与 其合成速率 最/ 相关 ，/而是与 （细胞在其细胞质中降解不同的mRNA的）同样是不同的速率 最为相关 。

解释： that引导的宾语从句中，在谓语correlate之后直到句子结束的部分是长长的状语，其中嵌套了两层固定搭配：not... but...; correlate with 。这两个固定搭配被组合到一块，变成了correlate best， not with... ，but rather with... 。rather后面省略了与前面一样的correlate best，使得句子简明扼要。