Southwest China vortex

例句：

1. 1.The Southwest China vortex is a major weather pattern in the region.
   西南中国涡旋是该地区的主要天气模式。
2. 2. The vortex has been causing severe weather conditions in the area.
   涡旋已经导致该地区严重的天气条件。
3. 3.The scientists are studying the effects of the Southwest China vortex on the environment.
   科学家们正在研究西南中国涡旋对环境的影响。