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The major structure in the area is the NE-NNE folded belt consisting of Banxi Group of the Middle Proterozoic era to the Ordovician system of the Early Paleozoic era. 由新元古界板溪群至下古生界奥陶系所构成的NE-NNE向褶皱带为区内主体构造；
Magnesite,talc and graphite mainly occur inthe Early and Middle Proterozoic basement rocks of the North China platform,Yantze platformand Jiamusi block. 菱镁矿、滑石、石墨等主要产于华北地台、扬子地台和佳木斯地块的早、中元古代基底中。
The country rock of the orebody are dolomites of Gaoyuzhuang Formation(Middle Proterozoic era). 矿床围岩以中元古界高于庄组白云岩为主。
The Middle Proterozoic granitoids was an intraplate type producted in transitinal crystalline basement before plate collision. 中元古界的花岗岩类是板块碰撞前过渡性结晶基底上局部熔融花岗岩类。
VMS mineralization,occurred in the middle Proterozoic era,formed cupriferous source bed. 早期矿化发生于中元古代晚期,形成含铜矿源层;
The opening paragraph invokes a vision of England in the early Middle Ages. 头一段的引言描绘出中世纪前期的英格兰景象。
The greatest historian of the early Middle Ages was an English monk named Bede. 中世纪早期最著名的历史学家是英国僧侣比德。
The middle Proterozoic crystalline schist series in the Panzhihua-Xichang region has undergone progressive regional metamorphism. 攀西中元古结晶片岩系遭受了前进区域变质作用。
The Shengong Movement in late Middle Proterozoic Era was strong and the superimposed fold of Junning Movement in late Qingbaikou Period was clear. 中元古代末的神功运动表现强烈，青白口纪末的晋宁运动叠加褶皱明显。
Conglomerate of the Middle Proterozoic Tietonggou Formation is in unconformity relation with the plagioclase schist of the Archean Taihua Group. 中元古界铁铜沟组砾岩，砾石形态多样，与下面的太古界太华群斜长片岩呈角度不整合接触。
During the early Middle Ages in Europe various stringed instruments were played with a bow. 在中世纪早期，欧洲也有许多种用弓来演奏的弦乐器。
The main diagenetic stage and relevant rock types are the Middle Proterozoic assemblage of gneissoid granodiorite-adamellite and the Sinean schistosity diorates. 主要成岩期及代表性岩类有：中元古界为片麻状花岗闪长岩－二长花岗岩，震旦纪为片理化闪长岩。
The main diagenetic stage and relevant rock types are the Middle Proterozoic assemblage of gneissoid granodiorite-adamellite and the Sinian schistosity diorates. 主要成岩期及代表性岩类有：中元古界为片麻状花岗闪长岩-二长花岗岩，震旦纪为片理化闪长岩。
The reservoir rocks are the Archaean migmatitic granite,biotite plagiogneiss,leucogranulitite and cataclasite and the Middle Proterozoic dolomite and quartzose sandstone. 岩石储集空间以密集发育的微观裂缝系统为主,宏观裂缝系统主要起渗流通道作用。
The giant Bayan Obo REE-Nb-Fe deposit is the world's largest REE deposit,which is hosted mainly by Middle Proterozoic Na-rich rocks,dolomitic rock and K-rich slate. 白云鄂博稀土-铌-铁矿是世界最大的稀土多金属矿床之一,主要产于中元古界富钠岩石、白云岩和富钾板岩中。
Gold mineralization in the study area is hosted in continental volcanic rocks of Middle Proterozoic, Xionger Group overlying the Archean crystalline basement. 本区金矿化产于太古界结晶基底之上的中元古界熊耳群陆相火山岩中。
Xiaoqingshan copper ore deposit occurred in Xiaoqingshan formation,Huili Group, Middle Proterozoic Suberathem,and the ore bodies obviously are hosted by the formation. 小青山铜矿床产于中元古界会理群小青山组中，主矿体严格受地层层位控制。
The Byzantine Church never had to function in a power vacuum, as had the Papacy in the early Middle Ages. 拜占庭教会决不会像中世纪早期的教皇统治那样在权力真空中履行职责。
The Middle Proterozoic Xiong er subvolcanic rocks are widely loucated in Xiong er Group volcanic rocks and the metamorphic basement near the bottom of Xiong er Group. 熊耳期次火山岩广泛分布于熊耳群火山岩及接近熊耳群底部的基底变质岩系中,活动时间贯穿整个熊耳期,以早期和晚期最为发育。
We started early in order to arrive before dark. 为了在天黑前到达，我们很早就动身了。