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主要因素；[数]主元素
1、element───n.元素；要素；原理；成分；自然环境；n.(Element)人名；(德)埃勒门特；(英)埃利门特
2、principal engineer───首席工程师
3、principal investigator───首席调查员；主要研究者
4、principal components───主分量；主成分
5、principal───n.ShouChang；校长；资本；当事人；adj.主要的；资本的
6、principal boy───n.哑剧男主角（常由女演员扮演）；哑剧中的男主角
7、school principal───校长
8、principal office───总部，总社；总办事处；校长室；总店，总部，总社
9、forborne principal───前移本金
1、The quality of college application essays, for both home and overseas students, is used by American universities as a principal element of the scholarship decision-making process.───对于国内外的申请者而言，申请文书的质量是决定申请美国大学奖学金成功与否的关键因素。
2、Design of the Principal Element of Harmonic Gear───谐波齿轮主要元件的设计
3、Application of Refined Principal - Element Analysis in Assessing Corporate Financial Appraisal───改进的主成分分析在公司财务评价中的应用
4、The "war on terror" will remain a principal element of American foreign policy.───“反恐战争”仍将会是美国外交政策的首要元素。
5、An imposing square bar sits in the center of the restaurant and ACTS as the principal element, enhanced by a round wood floor framing it.───一个让人印象深刻的广场酒吧在餐厅的中心，作为主元素，圆角的木板框架使它升高。
6、Said wedding, clothing is a principal element.───说道拍婚纱照，服装可谓是首要元素。
7、Application of data tapping technique in monitoring based on principal element analysis───基于主元分析的挖掘技术在过程监控中的应用
8、The synthetical model of safety comprehensive evaluation for air traffic control was established in the employ of principal element analysis method.───介绍了舰艇救生通道优化设计中综合安全评估的方法和步骤，着重考虑了人为因素对XiTong影响的不确定性。
9、staple--- A basic or principal element or feature───主要成分，基本成分=
1、The principal element of fixed assets is land and buildings acquired for development projects.
2、Securities private offering is the principal element in today's world capital market and has become an indispensable investment and financing way in economic development process of every nation.