英语语法分析

This area is hit by an average of about 5 hailstorms a year.

这个地区平均每年遭受大约五次冰雹袭击。

Hailstorms in Northern Greece: synoptic patterns and thermodynamic environment.

希腊北部雹暴：天气形势和热力环境。

Comparing with local heavy rain, the movement of radar echoes of hailstorms and thunderstorms is rapid.

冰雹、雷雨大风这类强对流天气的雷达回波移动速度快，而局地暴雨的雷达回波移动速度缓慢。