Pitchblende and chalcolite are much more radioactive than uranium itself.沥清铀矿和铜铀云母比纯铀的放射性强得多.Chalcolite ( crystallized phosphate of copper and uranium ) is about twice as radioactive as uranium.铜铀云母 ( 铜和铀的磷酸盐结晶体 ) 的放射性是铀...
The South African mailboat arrived on Friday mornings unless bad weather intervened.除非受恶劣天气干扰，南非邮船一般在星期五上午抵达。Hattie intervened and told me to stop it.哈蒂打断我，叫我停下来。"I've told you he's not here," Irena intervened....
防暴警察向人群中投掷了催泪瓦斯罐和烟幕弹。Riot police hurled tear gas canisters and smoke bombs into the crowd.军队用炮火和催泪瓦斯予以反击。The army responded with gunfire and tear gas.编辑基思·瓦斯否认他知道内部消息。Keith Vass, editor, denies he had inside knowledge....
Dolostone is the main rock type of the Cambrian in this area.从下寒武统石龙洞组开始都是白云岩沈积.Crystalline dolostone is formed by seepage - reflux dolomitization and burial dolomitization.晶粒白云岩有两种成因:一为回流渗透白云石化;二为深埋藏白云石化.Carbonate rocks...