查询词典 isotope

Either of two decay products of thorium ,meso thorium I,an isotope of radium,or meso thorium II,an isotope of actinium.

新钍钍的两种放射性生成物之一，即新钍1号，它是镭的同位素，或新钍2号，它是锕的同位素

With EPMA and analysis of oxygen isotope composition, the typies of amphibole, chemical composition of hornblende and oxygen isotope composition of quartz in sands and bedrocks in the Hotan River basin were determined.

本文运用电子探针和氧同位素测试等手段，分析了和田河流域沙物质及某些有关基岩所含角闪石的种类、普通角闪石的化学成分和石英的δ~(18)O值。

Carbonate ; Oxygen isotope ; Carbon isotope ; Fossil brachiopod ; Early diagenetic cement.

碳酸盐岩；氧同位素；碳同位素；腕足化石；早期成岩胶结物

Well-documented Lu-Hf isotope data from the oceanic basalts show that,the starting area of magma melting for the MORBs derived from the DMM component would be in the the depth of garnet peridotite,i.e.at the depth of 80―90 km instead of less than 60 km,which is at the depth of spinel peridotite as proposed early.The HIMU component,which is characterized by its high rediogenic lead,is refered as a special mantle component differentiated at some time in geological history from the lower mantle.A correlation study of Hf-Nd isotope between the chondrite and oceanic basalts implies that no isolated primitive mantle might have remained.

大量的大洋玄武岩Lu-Hf同位素研究表明：具亏损地幔端元来源的洋中脊玄武岩岩浆部分熔融的初熔区位于石榴石稳定场深度，即深度为80-90 km的石榴石二辉橄榄岩地幔，而不是原来所认为的尖晶石二辉橄榄岩区(深度小于60 km)；以高放射成因Pb为特征的高U地幔端元应代表了下地幔物质在某一特定时期发生分异作用的结果；球粒陨石与大洋玄武岩Hf同位素对比研究表明，没有原始地幔物质能保留至今的迹象。

Isotope analysis of teeth can reveal clues about a person's drinking water, and in turn the climate they came from, said Jane Evans, an isotope geochemist at the BGS.

同位素牙齿分析可以揭示一个人的饮水线索，从而气候他们从哪里来，吉英说埃文斯在英国地质调查局同位素地球化学。

The isotope exchange reaction between hydrogen and water by hydrophobia catalyst is an effective method to separate hydrogen isotope because of its mild operating conditions.

该项技术与商业利益密切相关，各国催化剂的具体制备工艺都是保密的，因此，必须自力更生，制备出适合工程上使用的高效、稳定的憎水催化剂。

Rather than indicating C isotope excursions, the Neoproterozoic data seem to represent normal isotope variations that occur during lithification and metamorphism.

这些新元古代样品的数据显示了碳同位素的漂移，但与此同时更表明在成岩和变质作用过程中普通同位素的变化。

Oxyhydrogen isotope relationship curve in the region indicates that the samples basically distribute in the upper left of local rainwater line and an obvious phenomenon of reverse "Oxygen drifting" exists. This kind of isotope distribution is the only one in the most karst groundwater in northern karat spring area that the authors have ever studied.

该区岩溶地下水氢氧同位素关系图表明，其样点基本分布在当地雨水线左上方，存在明显的反向"氧漂移"现象，这种现象在作者所见到我国北方多数岩溶泉域岩溶地下水的同位素分布是唯一的。

The result of factor analysis can provide the changes of relative precipitation and temperature variations. In trace elements, Cu, As, Zn, Pb and Ni were apparently enrichmented in soil layers and are sensitive to climatic changes. Carbon isotope is more sensitive to climatic changes than that of oxygen isotope in loess stratigraphy. The heavy mineral are varified in the loess stratigraphy, but their content differences between loess and palaeosol is little. Though the palynologic analyses results reveal that pollens and spores are fewer in the loess stratigraphy, they differ greatly in loess layer and palaeosol layer not only in species but also in types, i. e., the pollens and spores indicating warm and moist climate, such as Lles, Podocarpus, Polopydium, Pteris grerilliana Wall, Pterocarya and Juglans appear in palaeosol layers, while those indicating cold and dry climate such as Ephedra, Artemisia, Chinopodiaceae, Picea and Abies exist mainly in loess layers. The pollen content of broad-leaved tree mainly consisting of Pterocarya is up to 60% in palaeosol 〓, while the content of Ephedra is more than 50% in 〓 loess layer, showing that the environment differed greatly when 〓 and 〓 were formed.

当然，常量元素氧化物的组合因子分析结果可提供相对降水与相对温度在剖面的变化，因而来反映气候状况更为理想；微量元素中Cu、As、Zn、Pb与Ni在成土过程中富集明显，亦较好地反映了气候变化；稳定同位素中的碳同位素比氧同位素更能敏感记录气候的变化；研究区黄土地层中重矿物种类较多，但黄土层与古土壤层中含量差异不大；孢粉分析结果揭示，尽管研究区黄土层中孢粉总量相对较为贫乏，但黄土层与古土壤层中孢粉种属相差较大：在古土壤层内出现了指示相对暖湿环境的冬青属、罗汉松属、水龙骨属、林下凤尾蕨、枫杨、胡桃等植物孢粉，而黄土层中麻黄、藜科、蒿属及冷杉、云杉含量较高。

The feature of oxygen isotope for magnetite from Abagong iron deposit reflects that the water in the fluid of mineralization resides in the initial magma, implying the magma genesis of mineralization. The similaritary features of REE and trace elements for coexisting apatite with magnetite in the Abagong, the Kiruna type and the Ninwu porphyrite iron deposit show their common genesis, indicating that Abagong iron deposit resulted from the intrusion of late ore magma due to the magma differentiation. The characteristic of sulfur isotope composition implies that the Abagong iron deposit resides in basaltic magma from mantle resource.

阿巴宫铁矿磁铁矿氧同位素特征反映了成矿流体中水来源于原始岩浆水，暗示该铁矿的岩浆成因；与磁铁矿共生的磷灰石稀土和微量元素特征与Kiruna型铁矿以及宁芜玢岩铁矿中磷灰石特征非常相似，表明它们具有相同的成因机理，反映出阿巴宫铁矿为岩浆分异的晚期矿浆贯入式成因；其硫同位素特征表明成矿物质源自幔源的玄武质岩浆。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。