沥清铀矿和铜铀云母比纯铀的放射性强得多.Pitchblende and chalcolite are much more radioactive than uranium itself.铜铀云母 ( 铜和铀的磷酸盐结晶体 ) 的放射性是铀放射性的两倍.Chalcolite ( crystallized phosphate of copper and uranium ) is about twice as radioactive as u...
As Wren's epitaph famously declares, the cathedral itself is his monument.众所周知,雷恩的墓志铭中写道,大教堂本身就是他的纪念碑。The fourteenth century cathedral was reduced to a mass of rubble.这座14世纪的大教堂变成了一堆瓦砾。The cathedral was destroyed by...
他眼睛里有异物.He has some foreign matter in his eye.她手指肿大是内有异物所致.The swelling on her finger was caused by a foreign body in it.异物为什么如此有害,其确切原因尚不清楚.Exactly why the foreign body is so deleterious is not clear....
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