Radium can be used to treat cancer.镭可以用来治疗癌症.Radon is the daughter of radium.氡是镭的子体.Radium can be fixed some distance from its original source.镭在离它的原始母体一定距离上固定下来....
The alkylation of isoparaffin with olefin is an important process of petroleum processing.异构烷烃与低分子烯烃的烷基化反应是石油加工的重要过程之一.Recent advances in ring closing metathesis ( RCM ) reaction, including olefin and enyne metathesis re...
The demonstrators called on the government to publish a list of registered voters.游行者呼吁政府公布注册选民的名单。The Seattle Post - Intelligencer has become America's first major daily newspaper to publish online - only.西雅图邮报已经成为...