获取一个未编码的文本样例，计算文本中出现特定字母的次数，然后按频率最高到最低的顺序给字母排序。
Take a sample of unencoded text, count how many times specific letters appear in the text, and sort the letters in order from most to least frequent.
论述了BCH信道编码对FFH- OCDMA系统性能的影响，并将它和未编码的FFH- OCDMA系统进行了比较。
Then, the performance of BCH coded FFH OCDMA system was analyzed, and was compared with uncoded FFH OCDMA system.
当蛋白质根据新编码合成时，就会与未突变的蛋白有一些细微差异。
When a protein gets made from that new code, it’ll be slightly different from usual.
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