Some statistical values can only be generated during the master merging process. 某些统计值只有在主合并过程中才能生成。
They found that the severe kind may have formed from a recombination of less harmful grass viruses.In the process of recombination, the parent viruses exchanged a gene. 他们发现，危害较大的这种病菌成型于多种具有较小危害的草菌的合并，而且，在合并过程中，现在形成这种病菌改变了机质。
