The weather systems which cause the gales in the area are mainly cold wa- ve (cold front), low pressure zone in Mongolia(northeast), cyclone, typhoon and rainstorm.

引起本区域大风的天气系统主要有寒潮（冷锋）、蒙古（东北）低压、气旋、台风及雷雨。

youdao

This zone has the features of poor property, poor communication and low energy, and pressure is not affected by water injection well.

其特点是物性差、连通性差、能量小和压力不受注水井影响。

youdao

The heavy fogs of Shangqiu are formed by the weather situations: continental anticyclone, warm zone in front of cold front, uniform pressure field, and low pressure with an inverted trough.

商丘市的大雾多形成在大陆高压型、冷锋前暖区型、均压场型、(低压)倒槽型天气形势中。

youdao

They say there is particular concern over the very long-lived northern low pressure zone of circumpolar winds, called a vortex, found at between 13 and 34 km (8 and 21 miles) above the Earth's surface.

BBC: By Environment Correspondent Alex Kirby

The zone is a belt of low pressure that wraps around the planet.

CNN: STORY HIGHLIGHTS