Before revision:  Based on one of the methods which might be employed in most of the experiments} , we find that , roughly speaking, this translational ratio decays exponentially with mRNA length in prokaryotic cell, and reciprocally with mRNA length in eukaryotic cells  .
After revision:  Based on one of the methods which might be employed in most of the experiments} , we find that the translational ratio r decays exponentially with mRNA length in prokaryotic cell, and reciprocally with mRNA length in eukaryotic cells .