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artery n.动脉,要道 The railway system is regarded as the artery of our country.铁路系统被视为我国的大动脉. ascertain vt.弄清,查明;确定 Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.生物学家已经确定有专门的细胞把化学能转变成机械能. aspiration n.热望,渴望;志向 Young Edison had a strong aspiration to be an inventor.年幼的爱迪生就渴望成为一名发明家. contention n.论点,争论,争辩 Clumbuss contention that the earth was round turned out to be correct.事实证明哥伦布认为地球是圆的这论点是对的. The study of English requires effort and contention of mind.学习英语需要勤奋和精神上的毅力. continuity n.连续性,连贯性 There is no continuity of subject in a dictionary.词典里没有一个 连贯的主题. conversion n.转变,变换,改变信仰,转意归主 Information conversions can now be done in computers.现在信息转换可在电脑中进行. cooperative a.合作的;愿意合作的;协力的 n.合作社;合作商店 The rural credit cooprative is a financial organization.农业信用合作社是金融机构. | 
