" even if the total frequency of tropical cyclones does not increase" .

" 即使热带气旋的总频次没有增加。"

However, he added that " multiple lines of evidence" suggest more tropical cyclones are likely to happen in mid-latitudes, " even if the total frequency of tropical cyclones does not increase" .

然而，他还说，" 多条证据" 表明，" 即使热带气旋的总频率不会增加" ，中纬度地区也可能会出现更多的热带气旋。

Just like before, we select the two with the lowest frequency, put them into a little tree, and record the new total frequency of all the sub-items. Ok, we're almost done.

和之前一样， 我们选择频率最低的两个，把它们放到一棵小树上， 记录下所有子项的新的总频率。 好的，我们快完成了。