火山云

The greyish clouds have now turned into the hue of dark ashes very much like the spew and froth from the recent volcanic activity.

现在的灰云已变成了灰黑色，很像从最近的火山活动中的喷发物和泡沫。

People first spotted the noctilucent clouds a few years after the 1883 eruption of the Krakatoa super-volcano in Indonesia created spectacular sunsets from ash in the atmosphere.

人类首次观察到夜光云是在印度尼西亚的喀拉喀托超大火山1883年爆发数年之后，当时，剧烈上升的火山灰造成了壮观的日落天象。

The protolith of northern khondalite series in neighbouring region is a suite of flyschoid formation consisting of argillaceous arkose-pelitic feldspathic greywaske with intercalations of pelite, silt as well as carbonate and marl beds. They were deposited on continental margin under relative stable tectonic enviroment.

所有特征表明二者之间不存在有些研究者所认为的不整合接触关系，而是大量奥长花岗质-英云闪长质和一些中基性岩浆顺层侵入到一套沉积和火山-沉积表壳岩中，并一起经受多期复杂的变质和变形作用所成。

Finland in particular still seems to be affected by the cloud of volcanic ash.

尤其是芬兰，貌似仍然受到火山尘云的影响。

Nuclear reactors will melt, buildings will crumble, and a cloud of volcanic dust will block out the sun for 40 years.

核反应堆将融化，建筑物将会崩溃，以及火山灰尘会挡住40年太阳云。

The banded-augengranitic complex(476-413Ma) and charnokites (435Ma) in Yunkai upwelling area are formed in active continental margin Volcanic arc tectonic environment of subduction-collision in Caledonian and the augen granite and charnokiteare formed in the post-orogeny environment,and the intrusive gabbro(392Ma) are fromed in extensional environment of the end of Subduction-collision orogeny.

云开隆起区条带-眼球状花岗质杂岩（467-413Ma）及紫苏花岗岩（435Ma）形成于加里东期俯冲-碰撞活动大陆边缘火山弧构造环境，其中眼球状花岗岩、紫苏花岗岩形成于碰撞造山后环境，侵入辉长岩（392Ma）则是俯冲-碰撞造山作用阶段结束伸展环境下的产物。

Combined with available data, it is comidered that the sourcerock of biotite--leptynite might be intermediate-acid volcanic material of ca.2.7 Ga, and that of migmatized leptite and quartzite might come from granitic crust older than 3.0 Ga. The iron formation was formed on the continental crust base at about 2.7 Ga, and was immediately metamorphosed for the first time.

结合已有的研究资料可以认为，黑云变粒岩的原岩来自2.7 Ga左右的中酸性火山物质，浅粒岩和石英岩的原岩来自3.0 Ga以上的花岗质地壳物质；含铁建造形成于陆壳基底之上，形成时间约2.7 Ga，并于2.5—2.7 Ga之间发生首次变质作用。

In the afternoon of August 24 AD 79 Mount Vesuvius on the island of Sicily erupted sending out a huge cloud of glowing ash and barraging the surrounding country with showers of rock.

公元79年8月24日下午，西西里岛上的维苏威火山爆发了，喷出一大片炽热的灰云。岩石像暴雨般地落到周围的地区。

An ash cloud from Iceland's spewing volcano halted air traffic across a wide swathe of Europe on Thursday, grounding planes on a scale unseen since the 2001 terror attacks as authorities stopped all flights over Britain, Ireland and the Nordic countries.

冰岛火山爆发引起的火山灰云导致欧洲大片地区周四空中交通停摆，因官方勒令英国、爱尔兰和北欧国家暂停所有航班，故欧洲出现了自2001年恐怖袭击以来的又一次规模无法预计的飞机留地停飞状况。

Volcanoes also inject water vapor into the upper atmosphere, which can lead to night-shining clouds.

火山把水蒸气注入到高层大气之中，可以导致夜光云。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。