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- The volcanic rocks of Yanshan Period have features of the mantle source. 燕山期火山岩具备幔源特征。
- The gneissic adamellite: It is the production of magma movement at Yanshan period 1.3 hundred million years from now. 片麻状二长花岗岩：为距今1.;3亿年燕山期岩浆活动产物。
- The fractures of Palaeozoic buried hill reservoir in Futai oilfield mostly developed in Yanshan period, mainly high-angle fractures. 富台油田古生界潜山油藏裂缝主要发育在燕山期,以高角度裂缝为主,裂缝横向上主要受构造控制,在背斜顶部或高点较为发育;
- The peak-period of discharge and generating hydrocarbon of hydrocarbon source rock was in early, medial and later Yanshan period and Himalayan period. 发育二叠系、三叠系、侏罗系多套烃源岩,分别具有多期生、排烃特点。
- The distribution of rare metals and RE in space and origin correlated with granite of Yanshan period with horizontal and vertical zonal rules. 稀有稀土金属矿床在空间分布与成因上，与燕山期花岗岩体密切相关，往往具有水平分带和垂向分带规律。
- There are anhydrous and hydrous granulite xenoliths from crust in basalt dated late Yanshan Period in Hunan Province, China. 湖南道县玄武岩中的麻粒岩包体属辉石麻粒岩类,其稳定矿物组合为斜长石-单斜辉石-斜方辉石-尖晶石-角闪石。
- The primary factor of soil erosion is the erosion of Yanshan Period granite, the secondary factor is heavy rainfall, and the inducing factor is human activity. 水土流失产生的主导因素是燕山期花岗岩分布的丘陵区岩体结构遭到破坏；从属因素是持续强烈的降雨，从而加剧了水土流失；激发因素是人类工程活动对地质环境的破坏。
- Minhe basin is a typical Mesozoic and Cenozoic reformed sedimentary basin experienced many structural movements, such as formed in Yanshan period and reformed in Himalayan period. 民和盆地是一个典型的中新生代改造型沉积盆地,盆地的形成和发展经历了燕山期成盆,喜山期改造等多次构造运动,强烈的构造运动导致盆地内形成了众多的各类圈阅;
- Ore-forming has close relation with rich-alkalescence geotherm and calc alkali syeogranite, which belongs to middle temperature geothermal beryllium deposit, and formed in Mesozoic Yanshan period. 矿床的形成与富碱性热液和钙碱性正长花岗岩有关,为中温热液型铍矿床,形成于中生代燕山晚期。
- The quartz syenite porphyry body of Yanshan Period is the wall of lode.It is also the major metallization matrix rock.In the periphery of the area,there is the resemble and the same me... 在其外围有多处与其相似或相同的成矿地质背景,并有金矿化显示,表明在该区寻找同类型金矿床具有良好的找矿前景。
- It is suggested that the silver polymetallic deposit in North Qinling Orogenic Belt formed during the forehand basin forming period in the strech environment of late Yanshan period. 桐柏地区银多金属矿形成于北秦岭造山带燕山晚期伸展构造环境下前陆盆地发生阶段。
- Magmatic movements were strong in early Yanshan period of Mesozoic.Strong movements provided ore-forming space for activization, transportation, concentration and settlement of gold eleme... 该区中生代燕山早期岩浆活动强烈,剧烈的构造运动为金元素的活化、迁移、富集、沉淀提供了通道和成矿空间。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- He had to decide within a given period. 他得在一定时间内作出决定。
- She has a detailed knowledge of this period. 她对这段时期的情况了解地相当详细。
- In that period auto sales hit a14-year low. 这时期汽车销售量达到14年来最低水平。
- In this period, unemployment reaches record levels. 这段时间的失业人数又达到了创纪录水平。
