tephra信息详情
n.火山灰，火山碎屑
my step mom───我的继母
step down───辞职；走下；逐步减低；退休，辞职
initial steps───初始步骤
clinch mountain backstep───克林奇山后台阶
steped to───单步执行到
feminizing men step by step guide───女性化男人一步一步指南
step inside───走进里面；进入; 插脚
single step───n.单步执行
first steps───第一步，首要步骤；[电影]第一步
ratiocination steps───推理步骤
Mustafar's skies are obscured by choking black clouds of ash, smoke and tephra.───穆斯塔法的天空弥漫着令人窒息的黑云，其主要成分为灰烬、烟雾与火山灰。
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.───岩架上覆盖了厚厚的火山灰烬，其间点缀着火山玻璃珠和被称之为火山毛(Pele ' s hair)的熔岩细线。
Tephra is any fragmented material produced by a volcanic eruption, be it ash or rock.───灰烬还是岩石，所有因火山爆发而形成的碎片状物质都称作火山灰。
Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra , rather than lava flows.───爆炸性喷发产生的混合火山灰和其他碎片所谓火山灰，而不是熔岩流。
Black columns of the particles of ash and cinder that scientists call tephra rose hundreds of feet.───由火山灰和火山岩烬的微粒——科学们称之为火山碎屑——形成的黑烟柱冲向数百英尺的高空。
Tephra is any fragmented material produced by a volcanic eruption, be it ash or rock.───无论是灰烬还是岩石，所有因火山爆发而形成的碎片状物质都称作火山灰。
Holocene Tephra Deposits in the Northern Okinawa Trough───冲绳海槽北部的全新世火山碎屑沉积
Major volcanic eruptions also project significant quantities of tephra into the earth's upper atmosphere, with global effects.
Around the same time, a massive volcanic eruption in the Wrangell Mountains in Alaska occurred, blanketing the area in a layer of ash, up to a foot deep, called the White River tephra.
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.
A shower of tephra, stones and lapillus rained down and lasted 8 days and nights.
Significant changes in phytolith assemblages occur at the same depth as four major tephra. indicating a sharp decline in trees and shrubs and a surge in grass and Cyperaceae.