他参与了石油、锌和铅的勘探。He was involved in oil, zinc and lead prospecting.黄铜是铜锌合金。Brass is an alloy of copper and zinc.铜与锌熔合成黄铜the fusion of copper and zinc to produce brass...
Nowadays, only the two big houses remain roofed.现在，只有那两座大房子还有屋顶。Chinese book publishing houses are house directly under the Press andAdministration.中国书籍出版社是新闻出版署直属出版社.The houses will boast the latest energy-saving techno...
A muscular spasm in the coronary artery can cause a heart attack.冠状动脉的肌肉痉挛可能导致心脏病。The greatest occurrence of coronary heart disease is in those over 65.65岁以上者是冠心病的最高发人群。A hundred years ago coronary heart disease was virt...