The ancient Romans discovered that volcanic ash made better cement.

These things on the earth are actually all volcanic ash from volcanic eruptions.

地上的这些物质其实全部都是火山爆发时喷出的火山灰.

Exactly, when volcanoes erupt, out comes extremely hot lava, volcanic ash , steam, and so on.

就是, 火山喷发喷出来的东西可是温度很高的岩浆 、 火山灰, 和水汽什么的.

According to the radiation-optical quality of volcanic ash we calculated the parameter of radiation-optic .

本文根据火山灰粒子的辐射光学特性,计算了火山灰粒子和平流层本底的辐射 光学参数.

A heavy layer of volcanic ash rained down over the Aegean, covering islands and crops.

浓厚的火山灰层大量降下到爱琴海, 遮盖了岛屿和农作物.

The road to Lake is covered with thick layers of volcanic ash. It's steep and slippery!

前往天池的路面覆盖着厚厚的火山灰. 又陡又滑!

A very large ocean wave caused by an underwater earthquake or volcanic eruption.

由海底地震或火山喷发而造成的巨大海浪.

The Chilean government says towns destroyed a volcanic eruption will be rebuilt 10 km away, Reuters reported.

据路透社报道,智利政府将把因火山爆发而毁坏的城镇重建在10公里远的地方.

The science of forecasting a volcanic eruption has significantly advanced over the past 25 years.

预测火山爆发的科学大大超过过去25年的先进.

Volcanic eruption is the most dangerous, the most terrible natural disasters on earth.

火山喷发是地球上最危险 、 最可怕地自然灾害之一.

The trees were blasted by the volcanic eruption.

树木由于火山爆发而枯萎.

A tsunami is a giant wave caused by an underwater earthquake or volcanic eruption.

海啸是因为海底地震或是火山爆发所引起的巨大海浪.

Is there any other way of producing igneous rocks besides the volcanic eruption?

除了火山喷发形成岩浆岩这一种方式外,还有其它方式 吗 ?

Volcanic eruption facies and flooding facies are extensively developed in the Sihetun area, west Liaoning.

辽西四合屯地区中生代火山活动发育，广泛分布着火山作用形成的爆发相、溢流相火山岩。

Pulverized particulate matter ejected by volcanic eruption.

火山灰火山爆发喷射出来的粉末状颗粒物质.

All the similarities, the volcanic eruption, many people be convinced that Thera is Atlantis.

火山爆发, 社会形态,文化水平,这所有的相似之处, 使很多人相信西拉就是亚特兰蒂斯.

Dense clouds of ash were generated during the volcanic eruption.

火山爆发时,产生了浓密的火山灰云.

Piece of black, volcanic glass.

一块黑色的火山玻璃.

To cause ( molten lava ) to pour forth from a volcanic vent.

使(岩浆等)喷出使 ( 熔岩 ) 流出火山口.

Geology To cause ( molten lava ) to pour forth from a volcanic vent.

使(岩浆等)喷出:使 ( 熔岩 ) 流出火山口.

Tile study shows that the volcaniclastic turbidite deposited in a passive continental margin.

该区的火山碎屑浊积岩形成于被动大陆边缘构造环境.