So the particles of ash were very fine-grained and very sharp compared to normal ash.

所以此时的火山灰颗粒较普通的火山灰来说非常细小而且锋利。

youdao

Britain's Met Office, which is responsible for advisories on risks to aircraft from Icelandic ash, predicts the movement of ash clouds with a model built after the Chernobyl disaster.

英国气象局(Met Office)负责发布冰岛火山灰对飞机构成威胁的气象报告；它使用切尔诺贝利核灾难事故后建成的模型预测火山灰的运动。

youdao

The plume traveled to continental Europe, grounding flights around the world for days, due to fears of ash clogging plane engines. (Find out more about the risks volcanic ash poses to airplanes.)

由于担心漂浮的火山灰可能阻塞飞机引擎，横贯欧洲大陆的火山灰流让途径欧洲飞往各地的航线被纷纷滞留。

youdao

The French chemist Nicolas Leblanc discovered how to make soda ash from salt in the late eighteenth century.

VOA: special.2011.03.09

Ash up to three hundred meters thick covered more than six hundred square kilometers around the volcano.

VOA: special.2010.07.05

Rajan Vempati led a group that developed a new process to make rice hulls into ash.

VOA: special.2009.12.01

He said names of villages in Essex such as Eight Ash Green were testament to the historic importance of ash trees to communities in the past.

BBC: Ash dieback chalara cases confirmed in Essex

The company was given planning permission to pump ash into the lakes in 2007 but later agreed to use the 900, 000 tonnes of ash for landfill-capping, allowing the area to be used for conservation.

BBC: New Thrupp Lake wetlands centre appeal begins

That is all to conform with the array of EPA regulations on the horizon that include everything from mercury to coal ash to carbon dioxide.

FORBES: Winning the Presidency: Banking Clean Air or Bucking EPA?