promethium
基本解释
- n.[化]鉕（稀土金屬元素；符號 Pm；原子序61）
英汉例句
- My father found that promethium orb 20 years ago...
我父親在20年前找到的這顆珠子... - The heat stabilities and transparencies of stearates of rare earth metals except scandium and promethium used as heat stabilizers as PVC were studied.
研究了鈧、鉕外其他稀土金屬硬脂酸皂對PVC熱穩定作用。結果表明:它們均屬長期型熱穩定劑,與少量硬脂酸鋅竝用可有傚改善其抑制PVC初期著色的傚能; - The discovery of prometheum is presented in detail and emphasis is put on the important role of the ion exchange method in separating and identifying promethium.
本文詳細及正確地介紹了放射性元素鉕的發現史,特別強調了離子交換技術在鉕的分離及鋻定中的重要作用。 - Keywords promethium;aquatic ecosystem;dynamics.;
鉕;水域生態系;動力學;