Ore minerals, colloform and microcrystalline apatites , are identified as francolite through X - ray diffraction analysis fine.矿石矿物为胶状磷灰石和微晶磷灰石,经x - 射线衍射物相分析,其种属为含碳氟磷灰石....
Some students have more aptitude for academic work than others.一些学生比其他学生更有学术才能。More than a quarter of the avoidable deaths in the developing world are caused by TB...发展中国家的可避免死亡中超过1/4是由肺结核引起的。I sent them more than 6,000 ...