Dust from volcanic eruptions that blocks the Sun's warming radiation has been proposed as an explanation alternative to Milankovitch cycles for the cause of ice ages.
来自火山喷发的灰尘阻挡了太阳温暖的辐射，这被认为是导致冰河时代的另一种解释。
Miners tread down into the crater to collect blocks of bright-yellow sulfur, which forms when gaseous and molten sulfur emerges from fumaroles -- volcanic vents -- and hardens.
从火山口喷发出的硫磺蒸汽硬化凝结后，就形成了那些闪着黄色亮光的硫磺岩块，矿工们小心翼翼的探到火山坑底，冒着生命危险搜集这些黄色亮块。
The concentric stone circles that make up Stonehenge, 130 km southwest of London, consist of giant sandstone blocks and smaller bluestones-volcanic rock of a bluish tint with white flecks.
巨石阵位于伦敦南部130公里处，由巨大的砂岩石柱和较小的蓝砂岩(淡蓝色、带有白色斑点的火成岩)同心环绕布置而成。
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