1) Environmental lead
环境铅
1.
ObjectiveIn order to understand the levels of environmental lead and the preschool children s body lead as well as the effects on children s physical development.
目的 了解环境铅与幼儿体内铅水平及对幼儿体格发育的影响。
2) Lead pollution environment
铅污染环境
3) lead recycling rate
铅循环率
4) keying ring
嵌铅环
5) environmental
[英][ɪn,vaɪrən'mentl] [美][ɪn'vaɪrən'mɛntḷ]
环境
1.
Application of Environmental Monitoring and Supervision System in Fuzhou;
环境监测监控系统在福州市的应用
2.
Application in Environmental Protection and Administer by Nanometre Material;
纳米材料在环境保护和环境治理方面的应用
3.
An outline of environmental and management of Shenyang atmosphere;
沈阳市大气环境质量及治理概述
6) surroundings
[英][sə'raʊndɪŋz] [美][sə'raundɪŋz]
环境
1.
Bacteriology Survey of Surroundings in Temporary Iatrical Rubbish Depositary;
医疗废物暂时存放场所周围环境细菌学调查
2.
Construction technique for statically -pressed foundation piles and measures for reducing their influence on the surroundings;
静压桩施工技术与环境控制措施
3.
Design and Realization of Directing and Adjusting Federate Member and Its Surroundings in Fight Simulation;
作战仿真导调联邦成员生成环境的设计和实现
补充资料：铅-铅测年
分子式：
CAS号：
性质：238U和235U两个母体铀同位素的特性实质相同，所产生的放射性成因206,207Pb的方程可合并为（207Pb/206Pb）=[(235U/238U)]（t-1）。235U/238U现在的比值是1/137.8，利用非放射性成因‘稳定’204Pb作为参考同位素，作（207Pb/204Pb）与（206Pb/204Pb）的Pb-Pb等时线，应用方程计算年龄，式中（207Pb/204Pb）和(206Pb/204Pb)0是初始比值。
CAS号：
性质：238U和235U两个母体铀同位素的特性实质相同，所产生的放射性成因206,207Pb的方程可合并为（207Pb/206Pb）=[(235U/238U)]（t-1）。235U/238U现在的比值是1/137.8，利用非放射性成因‘稳定’204Pb作为参考同位素，作（207Pb/204Pb）与（206Pb/204Pb）的Pb-Pb等时线，应用方程计算年龄，式中（207Pb/204Pb）和(206Pb/204Pb)0是初始比值。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条