chemical sediment是什么意思

用法例句

In recent decades, the study of the paleoclimatic records and paleoecological paleoenvironmental meanings of speleothems ach.

洞穴化学沉积物由于其特有的微层结构及其内的稳定氧、碳同位素和微量元素所蕴含的古气候与古生态环境信息 ,并且具有分布广、时间长、信息保存完整等特点 ,因此 ,它是研究地球环境变化极好的自然环境历史档案。

Iso to pic study of speleothems is a very important way for reconstructing palaeo-envi-ro nment,A lot of results have been obtained in the radioactive isotopic dating and theapplication of δ￣(18)O to temperature measurement.

不同来源的ＣＯ＿２，有着不同的δ~（１３）Ｃ值，因而造成了不同的洞穴化学沉积物δ~（１３）Ｃ值。

Ca~(2+),Mg~(2+) contents of cave water and their changes are the basic and direct reflecting carriers to the maturity of speleothems.

洞穴水C a2+,M g2+含量及其变化量是洞穴次生化学沉积物发育程度的最直接和最基础的反演载体。

Mathematic model applying problem in chemistry;

数学方法在化学中的应用

Report of developments of tobacco chemistry in 2006;

2006年烟草化学学科研究发展报告

Student self-concept and conceptual understanding in learning chemistry;

学生自我概念和化学教学中概念理解的研究

Study about Evaluation Method of Lessons in Higher Chemical Education;

高师化学专业学生说课评价的研究

Thermally and chemically composite activation of coal gangue used in cement as mineral admixture;

煤矸石的热力-化学复合活化研究

The Present Situation of Agricultural University's Chemical Experiments and Reformatory Thinking;

农业院校化学实验教学现状及改革思路

Calculation of chemical exergier of paraffin and olefin by using group connectivity index;

用基团连接性指数计算烷烃和烯烃的化学