Lackner added that at the end of 2019, the fighting appeared to be slowing.

拉克纳补充道，到2019年底，冲突似乎正在缓和。

But Lackner notes there has been a serious increase in fighting since January, especially in Yemen's south.

但拉克纳指出，自一月以来，冲突，特别是也门南部的冲突急剧增加。