查询词典 quaternary

In this paper, according to the sedimentary characteristics of Quaternary stratum in the large inland basin s of Chinese northwestern dry district, it is expounded that the formed condition and distributed regularity of pore water in the loose rock.

本文根据我国西北干旱区大型内陆盆地第四纪地层的沉积特征，阐述了松散岩类孔隙水的形成条件和分布规律。并对盆地基底形态影响其储水构造发育的主要因素进行了探讨，由此提出了具有代表性的四种构造类型。为深入研究和开发利用地下水资源提供参考依据

Quaternary ice age it is a refuge for Tertiary flora and fauna, which retained a large number of biological Tertiary relict species.

它在第四纪冰川期是第三纪动植物的避难所，因而保留了大量第三纪生物残遗种。

Ginkgo tree is deciduous trees, the only remaining Quaternary post-glacial relict species in mainland China, there are known as living fossils.

银杏树为落叶乔木，第四纪冰川期后仅存中国大陆的孑遗树种，有活化石之称。

And are temporarily named as quaternary ammonium silver halides such as cetyltrimethylammonium silver bromide and cetyltrimethylammonium silver iodide.

暂时叫做季铵卤化银如十六烷基三甲基溴化银铵或十六烷基三甲基碘化银铵。

Slack water deposits are indicators of water level and age of paleoflood. They can be identified using Quaternary Period geology and hydrology, and can be aged using radioactive isotopes or other methods.

平流沉积物是洪水水位和发生年代记录的载体，利用第四纪地质学和水文学可以把它发掘出来并用放射性同位素或者其它断代方法测定它发生的年代，再通过断面恢复，进行流量推求，这就是古洪水研究。

Our work shows that, because of the large-scale dextral slip along the Red River fault zone, the northwest Yunnan rift-basin region, the extensive tectonics, are formed on the end since Miocene. The extensive basins have spread southeastwardly from the Miocene to the Quaternary. Typical strike-slip deformation appears at the center segment of fault zone. The granitic body in the late-Yanshan period, the coal-basins and the drainage of Lishe River are dextrally offset in-phase. The dextral displacement since the Pliocene can be 30~32km.

研究表明：中新世以来，红河断裂带大规模右旋走滑运动在北段区主要表现为尾端拉张伸展－构成典型的滇西北裂陷盆地区，且自中新世经上新世至第四纪，伸展型盆地由西北向东南扩展；中段区为典型的右旋走滑变形区，燕山晚期花岗岩体、上新世煤盆及礼社江水系均显示为同步右旋位错。

The sporophore of Cordyceps militaris and the cordycepin content of intermediate products were monitored in the whole course according to the relation between fixed and mobile phases of solvents in a combination system of binary and quaternary solvents, in which the applied methods were successively supercritical fluid extraction, alcohol sedimentation, low-pressure normal-phase silica-gel chromatography, reversed-phase high-performance liquid chromatography and fractional crystallization.

根据溶剂的固定相与流动相之间的相对关系，采用了二元和四元组合的溶剂系统，顺次采用超临界流体萃取法、醇沉法、低压正相硅胶色谱法、反相高效制备液相色谱法、分步结晶法和反相高效液相色谱法，子实体及其中间产物中的虫草素含量变化情况。

In order to select a perfective procedure and protocol for the fine grain OSL dating, measurements of natural IRSL and GLSL signals from a range of modern sediment samples collected from different sedimentary environment, tests of IRSL and GLSL bleaching behaviors for loess fine grains under sunlamp, and comparisons of the equivalent dose determined by different methods have been undertaken, as well as IRSL and/or GLSL dating of more than forty sediments samples taken from late Quaternary deposit strata at different site in North China.

为了选择更合适于中国北方沉积物样品细颗粒OSL测年的实验程序和技术，进行了华北地区不同沉积环境的现代沉积物样品的细颗粒天然IRSL和GLSL信号测量，黄土细颗粒IRSL和GLSL的光晒退测试，不同方法获得的等效剂量值的比较分析，以及取自华北不同地区的40余个晚第四纪沉积物样品的IRSL和GLSL测年。

The quaternary structures of aves, teleost and mammal Hbs were compared showing that the subunit distances and molecular volumes of aves and teleost Hbs are larger than mammal Hbs. Analysis indicates it is due to that the former two select residues with larger side chain.

通过对鸟类、硬骨鱼类和哺乳类血红蛋白的四级结构的比较，发现鸟类和硬骨鱼类血红蛋白亚基间的距离和分子体积大于哺乳类血红蛋白，分析表明这是由于前二者选择了较大侧链的残基。

The aggregation deposition ,the characteristic about the terrestrial and thalassic red clay in the Dalian is demonstrated,and the formation age of the Dalian red clay is determined before the Quaternary glacial age.

论证了大连地区陆地和海湾的红黏土都具有聚合沉积的特征，并且确定了大连红黏土形成期是在第四系冰川期之前。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。