单词:erbium materials
单词:erbium materials 相关文章
Last month, China banned imports of some waste materials that can be reused in manufacturing. The move is forcing other countries to rethink their policies on recycled waste. Before the ban, China was the first resting place for about half of the wor
By Suzanne Presto New York 30 August 2007 FBI agents were called to a United Nation's building near the headquarters Thursday to remove vials of a possibly hazardous material found in weapons inspectors' offices. From VOA's United Nation's bureau, Su
SCOTT SIMON, HOST: The world Philip Pullman created is back, in his hands and now ours. His Dark Materials trilogy, which began more than 20 years ago with a book called The Golden Compass is set in a world ruled by a theocratic overlords called The
BEIJING, June 25 (Xinhua) -- Tents, quilts, coats and other relief materials have been sent to southwest China's Yunnan and Sichuan provinces in the wake of an earthquake that jolted the area on Sunday, the Ministry of Civil Affairs said Monday. Loca
Ytterby 瑞典小镇伊特比 yttrium 钇 (1794) erbium 铒 (1842) terbium 铽 (1842) ytterium 镱 (1907) 1794年在瑞典小镇伊特比的黑石中发现了化学元素钇,决定用 Ytterby命名该元素:yttrium。1842 年在该镇的黑石中发