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- Re Os isotopic dating Re-Os同位素测年
- Secondly, the Os concentration and residence time in seawater, and Os isotope composition of seawater were precisely measured. 对海水中锇的浓度、滞留时间 ,以及现代海水的锇同位素组成进行了精确测定 ;
- The progresses of Os isotope in the marine environment in recent years have been summarized in this review, which may benefits our study on Os isotope in the future. 较系统地总结近年来锇同位素在海洋环境中的研究现状 ,对于指导以后的研究工作有着重要的意义
- Precise determination of the platinum-group elements and Os isotopic ratios in low-level rock samples. 岩石样品中低含量铂族元素和锇同位素比值的高精度测量方法。
- Application of Negative Thermal Ionization Mass Spectromery in Os Isotope Determination 负热电离质谱技术在锇同位素测定中的应用
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- We' re installing a new heating system. 我们正在安装新的取暖装置。
- The target system must be running a 32 bit OS. 目标系统必须运行32位的操作系统。
- I want to speak to you re your behaviour. [口]关于你的行为，我想跟你谈一谈。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- Dating of Sm Nd, Rb Sr isotopic systems and its dynamic singificance for the Proterozoic augen granite in Yunkai area. 云开元古宙眼球状花岗岩Sm-Nd和Rb-Sr同位素体系定年及其动力学意义
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- Re your letter of 1 September ... 关於您9月1日的来信 ...
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素，尤指碳14。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
