pyroclastic flow是什么意思

用法例句

A study on difierent volcano tourist resources;

基于不同特征的火山旅游资源开发

The relationship between El Nino, strong tide and volcano eruption in Ying Island in Japan;

厄尔尼诺事件和强潮汐与日本樱岛火山爆发的对应关系

Semiotic aspects of Beijing s "Volcano" disco;

火山"迪斯科的符号学侧面