查询词典 tephra

A shower of tephra, stones and lapillus rained down and lasted 8 days and nights.

火山灰、浮石、火山砾构成的"阵雨"在庞贝城下了8天8夜。

It is capable of intrusion into adjacent rocks or of extrusion onto the surface as lava or ejected explosively as tephra to form pyroclastic rock .

它有能力入侵到邻近的石块或挤压到表面的熔岩或跳伞爆炸性作为火山灰形成火山碎屑岩。

Volcanologist examining tephra horizons in south-central Iceland.

火山学家在冰岛中南部观察火山喷发碎屑。

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.

植硅体组合在4个主要的火山灰层都发生了明显的变化，表现在树木和灌木的急剧下降及禾草类和莎草科的繁盛。

A series of successional changes follow cach major tephra fall.initially the woody taxa are killed off and replaced by grass and Cyperaceae that rapidly colonise the fresh surface.

在每次火山灰降落后，都会有一系宁继后变化，木本类最早死亡，禾草类和莎草科取而代之，并很快占据裸露的地表。

Oulituozi, where the fierce volcanic activities occurred in Eocene of Cenozoic, is located in the middle eastern sag of Liaohe Basin. The main litholigies are basalt, trachyte and tephra.

欧利坨子位于辽河盆地东部凹陷中段，是新生代古近纪火山活动非常强烈的地区，主要岩性为玄武岩粗面岩和火山碎屑岩。

However, in 1989, the volcano produced lahars and tephra during the VEI 2 eruption.

压力和沮丧无处不在，即使圣诞节收到礼物也会让人心烦意乱。

A shower of tephra, stones and lapillus rained down and lasted 8 days and nights.

火山灰、浮石、火山砾构成的&阵雨&在庞贝城下了8天8夜。

This paper expatiates on the hazards of volcanic falling tephra, and demonstrates the pratical importance of making program for forecasting the risk of volcanic falling tephra.

简述了火山空降碎屑灾害的危害性，指出研制火山空降碎屑灾害预测软件包的实际意义。

Abrupt changes in available K resulted from the falling of fine tephra of the YTT eruption, and its abnormal zone about 1 meter thick implied that the fine tephra of the YTT eruption falling in wide provenances of loess was secondly carried with eolian dust into the loess Plateau of China by the East Asian winter monsoon during the early stage of the last glacial period.

固定铵的异常主要记录了YTT事件所产生的酸雨沉降，速效钾的异常则是由于YTT微细火山灰尘在黄土剖面及其广阔的物源区伴随酸雨沉降的结果，厚达1m的异常带表明末次冰期冬季风逐渐强盛和南移的过程。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。