目前已有不少特征选取方法应用于基因表达数据，比如顺序前进法、遗传算法、信噪比指标等。
Now there are several feature selection methods applied to gene expression data, such as Sequential Forward Selection, GA, S2N and so on.
问题就是问题，无论难易——检验它的唯一方法就是这个问题对你产生的负面冲击有多严重，是否阻碍了你前进的脚步。
A problem is a problem, whatever its ease or difficulty - the litmus test is how much it is impacting you negatively, preventing you from moving forward.
目前，确保全面回滚能力的唯一方法是在部署前进行完整的文件系统和数据库备份。
Currently, the only way to ensure total rollback capability is to do a full file system and database backup before the deployment.
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