最具有经济价值的铁矿包括磁铁矿和赤铁矿.Iron ores of greatest economic interest contain magnetite and hematite.A-Fe2O3(赤铁矿 ) 是中子衍射最先研究的化合物之一.A - Fe 2 O 3 ( haematite ) was one of the first compounds to be studied by neutron diffraction.发现一种...
Many, if not most, scientific papers are presented orally at scientific meetings.许多科学论文,即便不是大多数,都是以口头形式在科学会议上发表的。All candidates must first be orally examined.所有的考生必须先参加口试.Not to be taken orally!不可入口!...