The most ancient parts of the continental crust are 4000 million years old.
该大陆地壳最古老的那些部分有40亿年了。
Earth's crust contains very little of this element, but most asteroids contain a lot more.
地壳中含有的这种元素很少，但大多数小行星上的要多得多。
Geologists have found that the crust is about 4 to 10 miles thick under most of the oceans.
地质学家发现在绝大部分的海洋下面地壳厚度都是大约在4- 10英里之间。
Underplating of basic melt beneath the crust is one of the most important patterns of crust growth and represents an effective material and energy transfer from the mantle to the crust.
基性熔体的下垫作用是地壳生长的一种重要方式，并且代表了一种有效的幔向壳的物质与能量迁移。
Most hand samples show abundant semi-plastic features, such as twisted shape and molten crust, which might be caused by their flying in the air in the molten or semi-molten status.
溅射物外形多具有旋转扭曲形态及熔壳特征，显示了熔融、塑性- 半塑性特征。
The most important exothermal reactions in the crust can be expected from the chemical transformations of sulfides.
地壳中能够料想到的最重要的放热化学反应是硫化物的化学转变。
According to most theories, the prevailing forces in the Sicilian crust are similar to those in rift zones-extensional stresses that cause thinning of the crust and upwelling of the underlying mantle.
根据大多数的理论，西西里岛所在的地壳，主要遭受到的应力与张裂带类似：张力使地壳变薄、下方地函上涌。
The relationship between microbiotic crust and soil hydrology has been being the most disputed hotspot in the microbiotic soil crust research field.
微生物结皮与土壤水文过程的关系一直是微生物结皮研究中最具争议性的热点问题。
Earth surface system includes troposphere, hydrosphere, biosphere and the earth's crust of lithosphere, which is the closest and the most direct partition to the human survival in earth system.
地球表面系统包括大气圈的对流层、水圈、生物圈和岩石圈的地壳部分，是“地球系统”中与人类当前生存关系最密切、最直接的部分。
For most ore metals, the continental crust, especially, the upper continental crust, is the repository of all ores and protores.
对于大多数金属成矿元素 ，地壳特别是上地壳是大多数矿石和矿胎的储库 ，地壳丰度是元素富集成矿的物质基础。
The authors hold that the mechanical state and the change of tectonic stress fields of earth's crust are the most direct factors in seismic precursors.
认为地壳力学状态及其应力应变场的变化，是地震预报中最直接的前兆因素。
Pace of demandAntimony, the element most "at risk", is used extensively for fire proofing, but is deposited by hot fluids inside the Earth's crust and extracted mostly in China.
广泛用于防火的材料锑的需求加快，它也是最岌岌可危的元素，但元素沉积于地壳内的热流体，而且主要在中国提取。
The seas may be rising due to climate change, but most of the seafloor is also dropping as part of the natural dynamics of Earth's crust.
由于气候变化，海洋可能呈上升的趋势。但是多数海底却呈下降趋势，这是地壳自然动态的一部分。
Chromium is known as a widely distributed element in the crust and most important environmental pollutant.
铬是一种广泛分布于地壳中的元素，同时也是一种重要的环境污染元素。
Silicates are the most important forming-rock minerals of earth crust rock and in exogenous environments, and the dissolution of silicate minerals is universal.
硅酸盐是地壳岩石最主要的造岩矿物，表生条件下硅酸盐矿物的溶解是普遍的。
Most of the faults in the southeast coast of Fujian Province occur in the sial of upper crust and some have reached the sima.
福建东南沿海断裂1多发生于上地壳硅铝层，少数达硅镁层。
Granite is rich in quartz and feldspar in the coarse grain or intrusive rocks, the crust of the most common plutonic rocks from the cooling magma from deep in the crust.
花岗岩是富含石英和长石的粗粒或中粒侵入岩，是地壳中最常见的深成岩，由岩浆在地壳深处冷却而成。
Granite is rich in quartz and feldspar in the coarse grain or intrusive rocks, the crust of the most common plutonic rocks from the cooling magma from deep in the crust.
花岗岩是富含石英和长石的粗粒或中粒侵入岩，是地壳中最常见的深成岩，由岩浆在地壳深处冷却而成。
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