holoseismic method

例句：

1. 1. The volcanic eruption caused a massive ash cloud.
   火山喷发引发了大量火山灰云。
2. 2.Volcanic ash is a hazardous substance that can cause respiratory problems.
   火山灰是一种危险物质，可能导致呼吸问题。
3. 3.The volcano's activity has been monitored closely to prevent any potential ash fall.
   火山活动受到密切监控，以防任何潜在的火山灰坠落。