例句與造句

1. Methods such as the'frequency of optimal codons'( Fop ), the Relative Codon Adaptation ( RCA ) or the'Codon Adaptation Index'( CAI ) are used to predict gene expression levels, while methods such as the'effective number of codons'( Nc ) and Shannon entropy from information theory are used to measure codon usage evenness.
2. It's difficult to find codon adaptation index in a sentence. 用codon adaptation index造句挺難的