Up to now, a comparatively complete system of national standard methods for rare earth chemical analysis is established.

指出目前已初步形成了较为完善的稀土化学分析方法国家标准体系。

youdao

A historical record of work on national standard methods for rare earth chemical analysis in China is reviewed and recent development in this field is introduced.

回顾了我国稀土化学分析方法标准化工作的历史，并介绍了近年来我国稀土化学分析方法标准化工作的进展。

youdao

It was indicated there were polymer crystalline and two solidifying peaks in the rare-earth chemical grouting materials by the electronic microscope photograph, X-ray diffraction analysis and DSC.

从电镜照片，X光衍射图谱和DSC图谱上表明了稀土化学灌浆材料有聚合物的结晶和二次固化峰的存在。

youdao

This requires a mutli-disciplinary approach to research across the physical, life, chemical, Earth, social and economic sciences.

UNESCO: Providing scientific leadership towards Rio+20

We know from scientific studies on Earth that, given the right chemical elements and some energy, organic compounds form.

CNN: Three more homes for life in the universe?

There was also a widely shared view that so long as any nation on earth retained the capability to manufacture chemical weapons this sort of residual deterrent stockpile would be required.

CENTERFORSECURITYPOLICY: Center for Security Policy | Banning Chemical Weapons: Negotiating Unilateral US Disarmament